Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
dang nong » dang cong, hang nong, tang nong
doi hieu » doi chieu, doc hieu, doi hien
cua dang » cua cong, cua ban
menh van » dinh van, nen van, minh va
benh va » benh ve, benh dai, benh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh tranh cua dang nong ((menh van) or (benh va)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh tranh cua dang nong ((menh van) OR (benh va)) ban.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh tranh cua dang nong ((menh van) or (benh va)) ban*.