Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - hanh trinh vat ((nhung cong) or (thong cong)) ((van toan) or (van ban)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh vat ((nhung cong) OR (thong cong)) ((van toan) OR (van ban)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh vat ((nhung cong) or (thong cong)) ((van toan) or (van ban)) cau*.