Perhaps you should try some spelling variations:
voi nang » voi hang, hoi nang, voi rang
ban hanh » ban hang
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
vu dang » su dang, vu quang, cua dang
va nang » van nang, da nang, cam nang
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu

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 ((((voi nang) or (va nang))) or (vu dang)) mai hoi. hieu ve cac xuc ban hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((((voi nang) OR (va nang))) OR (vu dang)) mai hoi. hieu ve cac xuc ban hanh di cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach ((((voi nang) or (va nang))) or (vu dang)) mai hoi. hieu ve cac xuc ban hanh di cua tu*.