Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, phan duc
hanh vai » hanh vi, hanh va, hanh tai
thu hang » thi hang, thuc hanh, thu huong
van hanh » van thanh, ban hanh, van anh
pham duy » pham duc
so sach » so sanh, co sach, hoc sach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
bo sach » co sach, hoc sach
va hoi » xa hoi, va hoc, va hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (bo sach)) thu hang va hoi. hieu va ((cham duc) OR (pham duy)) van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) thu hang va hoi. hieu va ((cham duc) OR (pham duy)) van hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) thu hang va hoi. hieu va ((cham duc) OR (pham duy)) van hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) thu hang va hoi. hieu va ((cham duc) OR (pham duy)) van hanh vai cua te*.