Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
hieu quang » thieu quang, hieu quan, hieu qua
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » nhieu tang, hieu van, biet lang
tranh va » tranh van, trang va, trinh va
luong va » dung va
tan cau » toan cau, van cau, tan ca
va tan » van tan, va toan, va than

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) OR (hieu quang))) or (chieu sang)) - hanh tranh va nhung luong va tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((hieu lang) OR (hieu quang))) OR (chieu sang)) - hanh tranh va nhung luong va tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((((hieu lang) OR (hieu quang))) or (chieu sang)) - hanh tranh va nhung luong va tan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((((hieu lang) OR (hieu quang))) or (chieu sang)) - hanh tranh va nhung luong va tan cau*.