Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
hanh ly » khanh ly, hanh ky, hang ly
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
dai hoi » dai hoc, dai hai, dai moi
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
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) OR (ly nang)) ((ma hoi) or (dai hoi)). hieu vu cham luc va hanh ly cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) ((ma hoi) OR (dai hoi)). hieu vu cham luc va hanh ly cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ly nang)) ((ma hoi) or (dai hoi)). hieu vu cham luc va hanh ly cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ly nang)) ((ma hoi) or (dai hoi)). hieu vu cham luc va hanh ly cua tre*.