Perhaps you should try some spelling variations:
te sach » toc sach
va chua » vua chua, ca chua, va chu
hanh va » hang va, hanh vi
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
chua su » cua su, chua cu, chua tu
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
loc va » hoc va, luc va
ma hoi » xa hoi, ma hoa, me hoi

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 y nang ((ma hoi) or (mai hoi)). hieu ve cac ((loc va) or (duc va)) hanh va chua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((ma hoi) OR (mai hoi)). hieu ve cac ((loc va) OR (duc va)) hanh va chua su.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (mai hoi)). hieu ve cac ((loc va) or (duc va)) hanh va chua su*.