Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
te sach » toc sach
van dai » vanh dai, van dao, van hai
van van » van ban, tan van, san van
xuc van » duc van, luc van, vuc van
mai hoi » dai hoi, lai hoi, mai doi
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve cac » vien cac
cua su » qua su

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 ty nang ((mai hoi) OR (mai khoi)). hieu ((ve cac) or (va cac)) xuc van van dai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((mai hoi) OR (mai khoi)). hieu ((ve cac) OR (va cac)) xuc van van dai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((mai hoi) OR (mai khoi)). hieu ((ve cac) or (va cac)) xuc van van dai cua su".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((mai hoi) OR (mai khoi)). hieu ((ve cac) or (va cac)) xuc van van dai cua su*.