Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
chat tuc » chat xuc, luat tuc, chat huu
van chat » cao chat
hoc sach » hoc sinh, hoc cac, hoc anh
ky lang » ky dang, ky tang, tay lang
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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)) ((ky lang) or (ky nang)) xa hoi. hieu van chat tuc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ((ky lang) OR (ky nang)) xa hoi. hieu van chat tuc va hanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ((ky lang) or (ky nang)) xa hoi. hieu van chat tuc va hanh lai cua te*.