Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
chau tre » chay tren, chau tho, cho tre
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
van cam » van nam, van lam, van cau
ly nang » ky nang, ly hang, ly vang
tuc va » thuc va, truc va, tuc xa
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: ((thu sach) or (thuoc sach)) ly nang x hoi. hieu van cam tuc va hanh tai ((chau tre) or (cau thi))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ly nang x hoi. hieu van cam tuc va hanh tai ((chau tre) OR (cau thi)).
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) ly nang x hoi. hieu van cam tuc va hanh tai ((chau tre) or (cau thi))*.