Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
tinh trang » minh trang, tinh quang, tinh toan
hoc thieu » toc thieu, hoc hien
bang cong » dang cong, bang song, hang cong
trang va » tran van, hang va
cong tac » cong ty
than cau » toan cau, phan cau, than cap
toan cao » toan ban, toan tap
va bang » va nang, va lang, va ban

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 - tinh trang va bang cong tac ((than cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - tinh trang va bang cong tac ((than cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - tinh trang va bang cong tac ((than cau) or (toan cao))*.