Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
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 ((thieu sach) 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 ((thieu sach) OR (chieu sach)) - canh tranh va nhung cong ((san chat) OR (ban chat)) va.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - canh tranh va nhung cong ((san chat) or (ban chat)) va".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - canh tranh va nhung cong ((san chat) or (ban chat)) va*.