Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
danh vai » danh sai, danh va, doanh van
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, lai hoi
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
ve cam » ve cac, va cam, ve cai
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang mai hoi. hieu ((ve cam) or (ve cham)) tuc va danh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang mai hoi. hieu ((ve cam) OR (ve cham)) tuc va danh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: so sach y nang mai hoi. hieu ((ve cam) or (ve cham)) tuc va danh vai cua viet*.