Perhaps you should try some spelling variations:
su triet » su viet, su tien
ve triet » va trien
van hanh » van thanh, ban hanh, van anh
chat huu » pham huu
sach ly » sach y, sach lo, sach ty
hanh gi » hanh vi, danh gia, hanh noi
huu van » cuu van, huu han, luu van
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
hieu vu » hieu va, hieu su, dieu vu
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
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: tu sach ly nang ma hoi. ((hieu vu) or (hieu ve)) chat huu van hanh gi ((ve triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang ma hoi. ((hieu vu) OR (hieu ve)) chat huu van hanh gi ((ve triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang ma hoi. ((hieu vu) or (hieu ve)) chat huu van hanh gi ((ve triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang ma hoi. ((hieu vu) or (hieu ve)) chat huu van hanh gi ((ve triet) OR (su triet))*.