Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thu sach » tu sach, thuat sach, thuoc sach
cham luc » cham soc, nhan luc, cham cuu
day cua » dai cua
dau cua » dai cua, cau cua, dan cua
su sach » so sach, vu sach
hieu su » hieu sau, tieu su, hieu so
nang xa » nang x, lang xa, nang ma
su cham » su pham, tu cham, vu cham
luc va » duc va, tuc va, loc va
v nang » va nang, vu nang, van nang

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)) v nang xa hoi. hieu su cham luc va ((dau cua) OR (day cua)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) v nang xa hoi. hieu su cham luc va ((dau cua) OR (day cua)) cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thu sach)) v nang xa hoi. hieu su cham luc va ((dau cua) OR (day cua)) cua viet*".