Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
tu sach » thu sach, su sach, te sach
hieu tu » chieu tu, hieu tuc, hien tu
tu cham » toc cham, thi cham
luc van » luoc van, luu van, duc van
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang x hoi. hieu tu cham luc van ((hanh di) OR (hanh de)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu tu cham luc van ((hanh di) OR (hanh de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu tu cham luc van ((hanh di) OR (hanh de)) cua tre*.