Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
tranh cua » doanh cua, manh cua
dung cong » dung trong
choc chu » cho chu, choi chu, chon chu
dan toan » van toan, dan than, manh toan
toan tap » toan ban
hoc chu » hoc cau, hoc cho, hoc thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chu) or (choc chu)) tinh - canh tranh cua ((nhung cong) or (dung cong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chu) OR (choc chu)) tinh - canh tranh cua ((nhung cong) OR (dung cong)) dan toan tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc chu) or (choc chu)) tinh - canh tranh cua ((nhung cong) or (dung cong)) dan toan tap*.