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

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