Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
thu sach » tu sach, thuat sach, thuoc sach
truc van » truc va, thuc van, truc ban
cam truc » cau truc, nam truc, lam truoc
van cam » van nam, van lam, van cau
doi cua » dai cua, hoi cua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((te sach) or (toc sach))) or (thu sach)) ky nang ma hoi. hieu van cam truc van thanh doi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((te sach) OR (toc sach))) OR (thu sach)) ky nang ma hoi. hieu van cam truc van thanh doi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((((te sach) or (toc sach))) or (thu sach)) ky nang ma hoi. hieu van cam truc van thanh doi cua vat*.