Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cuu tre » cau tren, cau treo
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
cua tre » cua te, cua triet, dua tren
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve coc » ve cuoc, ve cac
luc va » duc va, tuc va, loc va
ve co » vo co, va co, de co

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 lang xa hoi. hieu ((ve coc) or (ve co)) luc va tinh vi ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu ((ve coc) OR (ve co)) luc va tinh vi ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu ((ve coc) or (ve co)) luc va tinh vi ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu ((ve coc) or (ve co)) luc va tinh vi ((cuu tre) OR (cua tre))*.