Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
xuc van » duc van, luc van, vuc van
ve cham » va cham, ve chat, vu cham
y nang » ky nang, ly nang, v nang
ve cam » ve cac, va cam, ve cai
vi 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: su sach y nang mai khoi. hieu ((ve cam) or (ve cham)) xuc van hanh ((vi cua) or (vai cua)) tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang mai khoi. hieu ((ve cam) OR (ve cham)) xuc van hanh ((vi cua) OR (vai cua)) tuc.
• Adding a wildcard symbol may retrieve word variants: su sach y nang mai khoi. hieu ((ve cam) or (ve cham)) xuc van hanh ((vi cua) or (vai cua)) tuc*.