Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
toc sach » hoc sach, doc sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang ma hoi. ((hieu va) OR (lieu va)) cham duc va hanh thai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky nang ma hoi. ((hieu va) OR (lieu va)) cham duc va hanh thai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang ma hoi. ((hieu va) OR (lieu va)) cham duc va hanh thai cua triet*.