Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
lang thang » cang thang, dang thanh, lang trong
hung thang » cang thang, hung tran
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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 - ((lang thang) or (hung thang)) cua thong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((lang thang) OR (hung thang)) cua thong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((lang thang) or (hung thang)) cua thong cong tac toan cau*.