Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
va cham » va chat, va tham
vu sach » vu bach, su sach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua
cu va » cuu va, tu va, su va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khach)) ty nang ma hoi. lieu va cham ((cu va) or (cuu van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ty nang ma hoi. lieu va cham ((cu va) OR (cuu van)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) ty nang ma hoi. lieu va cham ((cu va) or (cuu van)) hanh vi cua tre*.