Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, danh va, doanh van
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
x hoi » xa hoi, o hoi, x ho
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 ky) OR (sach y)) nang x hoi. hieu va am ((thuc va) OR (hoc dan)) danh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang x hoi. hieu va am ((thuc va) or (hoc dan)) danh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang x hoi. hieu va am ((thuc va) or (hoc dan)) danh vai cua triet*.