Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
hieu tinh » chieu tinh, lieu tinh, kieu tinh
tranh cua » doanh cua, manh cua
doc hieu » toc thieu, hoc thieu, hoc hien
ban chan » dan chan, ban than, ban nhan
chan tu » phan tu, han tu, chon tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - canh tranh cua ((nhung cong) or (thong cong)) ban chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - canh tranh cua ((nhung cong) OR (thong cong)) ban chan tu.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - canh tranh cua ((nhung cong) or (thong cong)) ban chan tu*.