Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cham duc » pham duc, cham soc, pham duy
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
tu sach » su sach, te sach, tu cach
anh lai » anh bai, anh tai, gianh lai
van anh » van thanh, tuan anh, van minh
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ky nang ((x hoi) or (o hoi)). hieu van cham duc van anh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ((x hoi) OR (o hoi)). hieu van cham duc van anh lai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang ((x hoi) or (o hoi)). hieu van cham duc van anh lai cua vat".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang ((x hoi) or (o hoi)). hieu van cham duc van anh lai cua vat*.