Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cua bang » chua bang, cua ban, cua dang
cong tac » cong ty
cong tan » cong san, cong thanh, cong ty
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: toc thieu xanh - anh tang cua bang ((cong tac) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - anh tang cua bang ((cong tac) OR (cong tan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - anh tang cua bang ((cong tac) or (cong tan)) toan cau*.