Perhaps you should try some spelling variations:
te sach » toc sach
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua tuc » cua duc, cua tu, cua thuoc
y nang » ky nang, ly nang, v nang
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca 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 y nang ((xa hoi) or (lai hoi)). hieu ve cau luc va hanh va cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((xa hoi) OR (lai hoi)). hieu ve cau luc va hanh va cua tuc.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((xa hoi) or (lai hoi)). hieu ve cau luc va hanh va cua tuc*.