Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
vai cua » hai cua, lai cua, bai cua
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 (co sach)) ty nang xa hoi. hieu va cham luc va thanh ((vai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ty nang xa hoi. hieu va cham luc va thanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (co sach)) ty nang xa hoi. hieu va cham luc va thanh ((vai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) ty nang xa hoi. hieu va cham luc va thanh ((vai cua) OR (dai cua)) tre*.