Perhaps you should try some spelling variations:
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu van
sang ma » tang ma, nang ma, sang tao
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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 ky) OR (sach y)) sang ma hoi. ((hieu ve) or (hieu va)) cam xuc va danh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) sang ma hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) sang ma hoi. ((hieu ve) or (hieu va)) cam xuc va danh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) sang ma hoi. ((hieu ve) or (hieu va)) cam xuc va danh vi cua vat*.