Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, tu cach
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
lai cua » dai cua, hai cua, lai chau
x hoi » xa hoi, o hoi, x ho

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 (te sach)) ty nang x hoi. hieu van cham duc tan thanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang x hoi. hieu van cham duc tan thanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang x hoi. hieu van cham duc tan thanh lai cua viet*.