Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
thanh dung » thanh duong, thanh tung, thanh hung
thong cong » trong cong, tong cong, thong thong
nhung van » phung van, nhung bai, nhung cau
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 ((chieu tinh) OR (trieu tinh)) - thanh dung va ((nhung van) or (thong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (trieu tinh)) - thanh dung va ((nhung van) OR (thong cong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) OR (trieu tinh)) - thanh dung va ((nhung van) or (thong cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) OR (trieu tinh)) - thanh dung va ((nhung van) or (thong cong)) dan toan cao*.