ROBOT.LK

When i change content of a page in my website, google not update it in their search results with in at least 2 weeks.

My website is a small one. And i have updated sitemap and submited it to google webmaster tools. also i have increased crawl rate of google for my site.

my site is <link removed> . can you give advices to do it??

It takes time to update on Google and 2 weeks is acceptable I think.
Google is a very busy search engines with millions of search queries per day, 1000s of new site additions, etc... They provide top priority for paid submissions. Free submissions are treated a normal priority.

TK domains are not considered as good domains. But those are not blacklisted as well. However, I suggest you to move to a .COM domain in future.

Also, the Google page rank of your web page represents how it is recognised by Google Search Engine.

To increase this, you need to submit your to many popular web sites (increase backlinks), add unique contents, etc...

However, for all these things, you need to be patient until Google does it from its end.