Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
tham thuc » nham thuc, pham thuc, tam thuc
tham xuc » tham nuoc, pham duc, cam xuc
thanh ki » thanh kim, thanh ky, thanh ke
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, mang may
su viet » so viet
ki su » ky su

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 tu ((nang ma) or (nang cao)) hoi. hieu qua ((tham xuc) or (tham thuc)) van thanh ki su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((nang ma) OR (nang cao)) hoi. hieu qua ((tham xuc) OR (tham thuc)) van thanh ki su viet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((nang ma) or (nang cao)) hoi. hieu qua ((tham xuc) or (tham thuc)) van thanh ki su viet*.