Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
hua khong » hoa khong, cua khong, hoac khong
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 - hanh trang ((cua thong) or (hua khong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trang ((cua thong) OR (hua khong)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trang ((cua thong) or (hua khong)) cong tac toan cau*.