Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
lieu tinh » trieu tinh, diep tinh, bien tinh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
hoc lieu » hoc dieu, hoc sieu, hoc tieu
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

You may be able to get more results by adjusting your search query.

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