Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
thong danh » thong dan, thong lanh, thong thanh
trong danh » trong doanh, truong danh, trong anh
hoc hieu » hoc thieu, hoc hien, doc hieu
tranh va » tranh van, trang va, trinh va
va thong » va thuong, va phuong, he thong
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: hoc hieu quang - canh tranh va thong ((thong danh) or (trong danh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu quang - canh tranh va thong ((thong danh) OR (trong danh)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu quang - canh tranh va thong ((thong danh) or (trong danh)) toan tap*.