Perhaps you should try some spelling variations:
chau tre » chay tren, chau tho, cho tre
cau luoc » cau luc, muu luoc, hau loc
lam chau » lai chau, lam chu, lam chat
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ty nang » ky nang, ty hang, ly nang
va cau » van cau, va cac, va dau
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: tu sach ((ty nang) or (ty xang)) x hoi. hieu va cau luoc ((van hanh) OR (ban hanh)) lam chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) x hoi. hieu va cau luoc ((van hanh) OR (ban hanh)) lam chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ty xang)) x hoi. hieu va cau luoc ((van hanh) OR (ban hanh)) lam chau tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) x hoi. hieu va cau luoc ((van hanh) OR (ban hanh)) lam chau tre*.