Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu
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: ((su sach) or (vu khach)) ty nang ma hoi. hieu ve cam tu va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) ty nang ma hoi. hieu ve cam tu va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) ty nang ma hoi. hieu ve cam tu va hanh vi cua vat*.