Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
hoi cua » hoi chuc
va dinh » van dinh, va kinh, va tinh
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
sai ky » sac ky
cua tu » cua tuc, cua su, cua cu

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 (sai ky)) nang ma hoi. hieu va cam xuc ((va hanh) or (va dinh)) hoi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sai ky)) nang ma hoi. hieu va cam xuc ((va hanh) OR (va dinh)) hoi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sai ky)) nang ma hoi. hieu va cam xuc ((va hanh) or (va dinh)) hoi cua tu*.