Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
hiem ngan » kim ngan, viem gan
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong van » cong vang, cong san, song van
tuan cao » toan cao, quang cao, thuan cam
juan cao » quang cao, toan cao, quan cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hiem ngan) or (kim ngoc)) - hanh tranh cua nhung cong van ((tuan cao) or (juan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hiem ngan) OR (kim ngoc)) - hanh tranh cua nhung cong van ((tuan cao) OR (juan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hiem ngan) or (kim ngoc)) - hanh tranh cua nhung cong van ((tuan cao) or (juan cao))*.