Perhaps you should try some spelling variations:
nhung cong » thong cong, nhung don, nhung lang
tieu tinh » trieu tinh, tieu trinh, lieu tinh
tranh cua » doanh cua, manh cua
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
hoc tieu » hoc thieu, hoc dieu, hoc sieu
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 tieu tinh - canh tranh cua ((((nhung cong) OR (dung cong))) or (hang cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tieu tinh - canh tranh cua ((((nhung cong) OR (dung cong))) OR (hang cong)) dan toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tieu tinh - canh tranh cua ((((nhung cong) OR (dung cong))) or (hang cong)) dan toan cao*".