Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tranh van » tran van, trinh van, thanh van
dong cong » duong cong, dang cong, cong cong
dung cong » dung trong
dan than » dan chan, ban than, van than
van tuan » van quan, van ban, anh 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 - canh tranh van ((dong cong) OR (dung cong)) ((dan than) or (van tuan)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tranh van ((dong cong) OR (dung cong)) ((dan than) OR (van tuan)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh tranh van ((dong cong) OR (dung cong)) ((dan than) or (van tuan)) cap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh van ((dong cong) OR (dung cong)) ((dan than) or (van tuan)) cap*.