Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
gia doanh » gia thanh, gia dinh, giai doan
sach kem » hanh kem
hieu van » hieu va, thien van, lieu va
tai cua » thai cua, tai cuc, tri cua
duc gia » quoc gia
lam duc » lam duoc, pham duc, nam duoc
van lam » van nam
sach ky » sac ky, sach y, sach hay
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao

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) OR (sach kem))) or (sach ty)) nang ma hoa. hieu van lam duc gia doanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach ky) OR (sach kem))) OR (sach ty)) nang ma hoa. hieu van lam duc gia doanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((((sach ky) OR (sach kem))) or (sach ty)) nang ma hoa. hieu van lam duc gia doanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((((sach ky) OR (sach kem))) or (sach ty)) nang ma hoa. hieu van lam duc gia doanh tai cua triet*.