Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
nang mai » nang ma, nang tai, lang mai
vu sach » vu bach, su sach
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
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: ((vu sach) OR (vu khach)) ky nang mai hoi. hieu ((ve cam) or (va cam)) xuc va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky nang mai hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ky nang mai hoi. hieu ((ve cam) or (va cam)) xuc va hanh vi cua vat*".