Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
cau phuc » cau truc, chau phu, huu phuc
hanh dai » hanh tai, hanh dao, vanh dai
mai hoi » mai khoi, dai hoi, lai hoi
van cau » van dau, van hau, van chat
phuc va » phuc vu, thuc va, chuc va
va hanh » van hanh, va thanh, va danh
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: ((thuoc sach) or (thuat sach)) y nang mai hoi. hieu van cau phuc va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) y nang mai hoi. hieu van cau phuc va hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) y nang mai hoi. hieu van cau phuc va hanh dai cua triet*.