Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
cau luoc » cau luc, muu luoc, hau loc
luoc van » luoc can, luoc va, luc van
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
lam chau » lai chau, lam chu, lam chat
chau tre » chay tren, chau tho, cho tre
ty nang » ky nang, ty hang, ly nang
van cau » van dau, van hau, van chat
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 ((ty nang) or (ty xang)) x hoi. hieu van cau luoc van hanh lam chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) x hoi. hieu van cau luoc van hanh lam chau tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty xang)) x hoi. hieu van cau luoc van hanh lam chau tre*.