Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tran » hanh trang, thanh tran, hanh tram
tran van » luan van
van dung » van dong, xay dung, tin dung
dong dat » dong vat, dong ha, dong tai
dung dat » dung va, dung tai
phan dau » phan tu, hang dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - hanh tran van dung ((dong dat) or (dung dat)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - hanh tran van dung ((dong dat) OR (dung dat)) phan dau.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh tran van dung ((dong dat) or (dung dat)) phan dau*.