Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
thanh tung » thanh cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
vang tuan » van tuan, vong tuan, quang tuan
tuan cao » toan cao, juan cao, quang cao
tung va » trung va, tuong va, dung va

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