Perhaps you should try some spelling variations:
khanh ly » khanh duy, thanh lay, hanh ky
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
hanh ly » hanh ky, hang ly, hanh y
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi

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 vu cham luc va ((hanh ly) OR (khanh 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 vu cham luc va ((hanh ly) OR (khanh 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 vu cham luc va ((hanh ly) OR (khanh ly)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (mai hoi)). hieu vu cham luc va ((hanh ly) OR (khanh ly)) cua tre*.