Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh tran » hanh trang, thanh tran, hanh tram
nhung don » nhung van, nhung bo
dung cong » dung trong
tran van » luan van
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh tran van ((((nhung don) OR (dung cong))) OR (thong cong)) dan toan cao~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tran van ((((nhung don) or (dung cong))) or (thong cong)) dan toan cao*.