Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
nang cong » nang song, dang cong, bang cong
khoan cam » khoa cam, khoan va, phan cam
hanh han » hanh nhan, hanh phan, hanh san
cong dan » cong san, cong tan, huong dan
than cao » toan cao, thai cao, than cap
va nang » van nang, da nang, cam nang
han va » hang va, hanh va, nhan va

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 han va nang cong dan ((than cao) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh han va nang cong dan ((than cao) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh han va nang cong dan ((than cao) or (khoan cam))*.