Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh kem, hanh va
so sach » so sanh, bo sach, co sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
su pham » san pham
hieu su » hieu sau, tieu su, hieu so
ty tang » tay tang, ty hang, ky tang
cuu tre » cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty tang) or (ty xang)) ma hoi. hieu su pham duc va hanh lam ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty tang) OR (ty xang)) ma hoi. hieu su pham duc va hanh lam ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty tang) or (ty xang)) ma hoi. hieu su pham duc va hanh lam ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: so sach ((ty tang) or (ty xang)) ma hoi. hieu su pham duc va hanh lam ((cua tre) OR (cuu tre))*.