Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh vai » thanh hai, thanh van, thanh tai
thu sach » thuat sach, thuoc sach, thu hoach
dua tren » dung tren
tu sach » su sach, te sach, tu cach
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
ve cao » va cao, ve bao, ve cac
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. hieu ve cao duc tan thanh vai ((dua tren) OR (cua te))~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang x hoi. hieu ve cao duc tan thanh vai ((dua tren) or (cua te))*.