Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, khau sach
danh vai » danh sai, danh va, doanh van
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai
va am » va lam, va cam

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 (((thu sach) OR (thu hoach)))) ky nang o hai. hieu va am thuc va danh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (((thu sach) OR (thu hoach)))) ky nang o hai. hieu va am thuc va danh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((thu sach) OR (thu hoach)))) ky nang o hai. hieu va am thuc va danh vai cua triet*.