Perhaps you should try some spelling variations:
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
ve cau » ke cau, va cau, ve cac
luc va » tuc va, loc va
va qua » va quan, va quy, va quang

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 cau ((luc va) or (duc va)) hanh va qua 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 cau ((luc va) OR (duc va)) hanh va qua su.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (mai hoi)). hieu ve cau ((luc va) or (duc va)) hanh va qua su*.