Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
van hoc » van hoa
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
cua cuc » cua cac, cua duc, cua tuc
y nang » ky nang, ly nang, v nang
cua cu » cua chu, cua cau, cua su
nuoc » quoc, duoc, ngoc

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 xa hoi. hieu ((van cac) or (van hoc)) nuoc va tinh va ((cua cu) or (cua cuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((van cac) OR (van hoc)) nuoc va tinh va ((cua cu) OR (cua cuc)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((van cac) or (van hoc)) nuoc va tinh va ((cua cu) or (cua cuc))*.