Perhaps you should try some spelling variations:
chieu quan » hieu quan, thieu quang, hieu qua
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu quan - canh tranh va nhung cong dan ((((von tai) or (toan cao))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu quan - canh tranh va nhung cong dan ((((von tai) OR (toan cao))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho chieu quan - canh tranh va nhung cong dan ((((von tai) or (toan cao))) or (toan tap))*.