Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cua tre » cuu tre, cua triet, dua tren
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
sach vu » sach va, sach uu, sach xu
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach ty
luc va » duc va, tuc va, loc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach vu) or (sach tu)) nang xa hoi. hieu va cham luc va hanh de ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach vu) OR (sach tu)) nang xa hoi. hieu va cham luc va hanh de ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach vu) or (sach tu)) nang xa hoi. hieu va cham luc va hanh de ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach vu) or (sach tu)) nang xa hoi. hieu va cham luc va hanh de ((cua tre) OR (cua te))*.