Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hang hoi » hang hoa, hang hai, hang doi
nam thuc » nam thuoc, nam thu, nam tu
ban hang » ngan hang
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
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: bo sach ky nang ma hoi. hieu ve ((nam thuc) OR (am thuc)) ban hang hoi ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky nang ma hoi. hieu ve ((nam thuc) OR (am thuc)) ban hang hoi ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ky nang ma hoi. hieu ve ((nam thuc) OR (am thuc)) ban hang hoi ((cua triet) or (va triet))*".