Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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