Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
via cua » gia cua, gian cua, giau cua
ma hoi » mai hoi, xa hoi, ma hoa
va cua » va chua, ca cua, ma 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 cac ky nang ma hoi. ((hieu ve) or (hieu va)) cam duc van hanh ((va cua) or (via cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ma hoi. ((hieu ve) OR (hieu va)) cam duc van hanh ((va cua) OR (via cua)) te.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ma hoi. ((hieu ve) or (hieu va)) cam duc van hanh ((va cua) or (via cua)) te*.