Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, nam thu, nam tu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ha » hieu hoa, hieu ca, hieu xa
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x hoi. ((hieu ha) or (hieu va)) ((nam thuc) OR (am thuc)) dang thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. ((hieu ha) OR (hieu va)) ((nam thuc) OR (am thuc)) dang thanh vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. ((hieu ha) or (hieu va)) ((nam thuc) OR (am thuc)) dang thanh vai cua triet*".