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
hieu van » hieu va, thien van, lieu va
van chau » van chat, van cau, van hau
chau phu » chau phi, chau au, chau tho
vanh dai » van dai, vanh tai, lanh dao
nang ma » tang ma, sang ma, nang cao
va vanh » va van, va danh, va hanh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
phu va » phuc va, phu la, phu da

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 ma hoi. hieu van chau phu va vanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) y nang ma hoi. hieu van chau phu va vanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) y nang ma hoi. hieu van chau phu va vanh dai cua triet*.