Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, hieu ca, biet cach
tranh va » tranh van, trang va, trinh va
san chat » van chat, san chay, san nhat
ban chat » van chat, bao chat, luan chat

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 cach) or (chieu sach)) - canh tranh va nhung cong ((san chat) or (ban chat)) va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (chieu sach)) - canh tranh va nhung cong ((san chat) OR (ban chat)) va.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (chieu sach)) - canh tranh va nhung cong ((san chat) or (ban chat)) va*.