Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
cua trong » cua truong, cua trung, qua trong
anh tang » anh bang, anh dang, anh sang
anh nang » ganh nang, anh bang, anh dang
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap
khan cap » khan ap, than cap, khoan cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((anh tang) OR (anh nang)) cua trong cong tan ((than cau) OR (khan cap))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((anh tang) or (anh nang)) cua trong cong tan ((than cau) or (khan cap))*.