Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van coc » van loc, van co, van cuc
van hoc » van hoa
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cuu tre, cua triet, dua tren
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: su sach ky nang xa hoi. hieu ((van coc) OR (van hoc)) luc va tinh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((van coc) OR (van hoc)) luc va tinh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((van coc) OR (van hoc)) luc va tinh vi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((van coc) OR (van hoc)) luc va tinh vi ((cua tre) or (cua te))*.