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

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) OR (cam nang)) cong dan ((than cao) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh han ((va nang) OR (cam nang)) cong dan ((than cao) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh han ((va nang) OR (cam nang)) cong dan ((than cao) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh han ((va nang) OR (cam nang)) cong dan ((than cao) or (khan cap))*.