Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
van toan » van tuan, van tan, van thanh
van tai » von tai, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chieu xanh)) - canh tranh cua thong cong ((van toan) or (van tai)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu xanh)) - canh tranh cua thong cong ((van toan) OR (van tai)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu xanh)) - canh tranh cua thong cong ((van toan) or (van tai)) ban*.