Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
va kinh » va tinh, qua kinh
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
cam luc » cam xuc, cau luc
di cua » dai cua, doi cua, de cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va 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: te sac ky nang ma hoi. hieu va cam luc ((va hanh) or (va kinh)) ((vai cua) or (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ma hoi. hieu va cam luc ((va hanh) OR (va kinh)) ((vai cua) OR (di cua)) te.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ma hoi. hieu va cam luc ((va hanh) or (va kinh)) ((vai cua) or (di cua)) te*.