Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu quang » thieu quang, hieu quan, hieu qua
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » nhieu tang, hieu van, biet lang
nang cong » nang song, dang cong, bang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tranh va » tranh van, trang va, trinh va
toan ban » van ban
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (((hieu lang) OR (hieu quang)))) - hanh tranh va nang cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (((hieu lang) OR (hieu quang)))) - hanh tranh va nang cong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (((hieu lang) OR (hieu quang)))) - hanh tranh va nang cong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (((hieu lang) OR (hieu quang)))) - hanh tranh va nang cong manh toan ban*.