Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
hoc anh » hoc nganh, hoc nhanh, ngoc anh
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
tuc va » thuc va, truc va, tuc xa
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (((hoc sach) or (hoc anh)))) ky nang x hoi. hieu van lam tuc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (((hoc sach) OR (hoc anh)))) ky nang x hoi. hieu van lam tuc va hanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (((hoc sach) or (hoc anh)))) ky nang x hoi. hieu van lam tuc va hanh tai cua te*.