Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
tranh chua » tranh cua, trinh chuan, tranh chap
chua nhung » cua nhung, thuat nhung, cua chung
hieu sang » chieu sang, hieu quang, nhieu tang
hieu lang » chieu sang, hieu quang, nhieu tang
manh toan » thanh toan, anh tuan

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

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