Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
tong cong » trong cong, cong cong, dung cong
tranh va » tranh van, trang va, trinh va
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 va ((((nhung cong) or (hang cong))) or (tong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tranh va ((((nhung cong) OR (hang cong))) OR (tong cong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh va ((((nhung cong) or (hang cong))) or (tong cong)) dan toan cao*.