Perhaps you should try some spelling variations:
ve triet » va trien
nam thuc » nam thuoc, am thuc, nam thu
su triet » su viet, su tien
ban hanh » ban hang
thi van » thi lan, thi hanh, thi nang
sach ky » sac ky, sach y, sach ty
van anh » van thanh, tuan anh, van minh
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
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: te sach ky nang ma hoi. thi van nam thuc ((ban hanh) or (van anh)) dat ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. thi van nam thuc ((ban hanh) OR (van anh)) dat ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. thi van nam thuc ((ban hanh) or (van anh)) dat ((su triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. thi van nam thuc ((ban hanh) or (van anh)) dat ((su triet) OR (ve triet))*.