Perhaps you should try some spelling variations:
chau tre » chay tren, chau tho, cho tre
lam chau » lai chau, lam chu, lam chat
hanh lam » thanh lap, hanh kem, hanh va
can hanh » ban hanh, van hanh, dan hanh
hoc can » hoc dan, hoc cao, hoc cac
cau hoc » cau hoi, cau hoa, cao hoc
tu sach » thu sach, su sach, te sach
hieu va » hieu qua
ty nang » ky nang, ty hang, ly nang
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) or (lieu va)) cau hoc can 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) OR (lieu va)) cau hoc can hanh lam chau tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) x hoi. ((hieu va) or (lieu va)) cau hoc can hanh lam chau tre*.