Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
thu sach » tu sach, thuat sach, thuoc sach
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
va cham » va chat, va tham
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thu sach)) ly nang xa hoi. lieu va cham luc va ((hanh di) OR (hang di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ly nang xa hoi. lieu va cham luc va ((hanh di) OR (hang di)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thu sach)) ly nang xa hoi. lieu va cham luc va ((hanh di) OR (hang di)) cua tre*".