Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
nuoc ban » nuoc san, quoc ban, buoc ban
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
van dat » van dao, van dau, dan dat
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y nang xa hoi. hieu van dat nuoc ban hanh lai ((chau tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang xa hoi. hieu van dat nuoc ban hanh lai ((chau tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang xa hoi. hieu van dat nuoc ban hanh lai ((chau tre) or (cau tren))*.