Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
va thanh » gia thanh, ban thanh, va tinh
cham luc » cham soc, nhan luc, cham cuu
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va danh, ban hanh
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
ly cua » le 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 ((ma hoi) or (mai hoi)). hieu van cham luc ((va hanh) OR (va thanh)) ly cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((ma hoi) OR (mai hoi)). hieu van cham luc ((va hanh) OR (va thanh)) ly cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) or (mai hoi)). hieu van cham luc ((va hanh) OR (va thanh)) ly cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (mai hoi)). hieu van cham luc ((va hanh) OR (va thanh)) ly cua tre*.