Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
cam truc » cau truc, nam truc, lam truoc
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua dieu
vu sach » vu bach, su sach, vu khach
mai hoi » mai khoi, dai hoi, lai hoi
qua cam » qua cham, qua cac, qua ca
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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 v nang mai hoi. hieu qua cam truc va hanh vai ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach v nang mai hoi. hieu qua cam truc va hanh vai ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: vu sach v nang mai hoi. hieu qua cam truc va hanh vai ((cua viet) or (cua vat))*.