Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de 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 ky nang mai hoi. hieu ((ve cam) or (va cam)) xuc va hanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang mai hoi. hieu ((ve cam) OR (va cam)) xuc va hanh di cua vat*.