Perhaps you should try some spelling variations:
van nang » van quang, van ban, van dong
ban hanh » ban hang
te sach » toc sach
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc ban » duc ban, cuc ban, quoc ban
vai cua » dai cua, hai cua, lai cua
v nang » va nang, vu nang, voi nang
ma hoi » mai hoi, xa hoi, ma hoa
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: te sach ((v nang) or (van nang)) ma hoi. hieu va cac xuc ban hanh ((vi cua) OR (vai cua)) tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (van nang)) ma hoi. hieu va cac xuc ban hanh ((vi cua) OR (vai cua)) tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) or (van nang)) ma hoi. hieu va cac xuc ban hanh ((vi cua) OR (vai cua)) tuc".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (van nang)) ma hoi. hieu va cac xuc ban hanh ((vi cua) OR (vai cua)) tuc*.