Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
cong vang » cong quang, cong ngang, cong san
cong lang » cong luong, cong quang, cong ngang
trung va » truong va, trang va, trung ha
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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