Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
cua tre » cua te, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cam » ve cham, ve cac, va cam
luc 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: so sach ky lang xa hoi. hieu ve cam ((duc va) or (luc va)) hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. hieu ve cam ((duc va) OR (luc va)) hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. hieu ve cam ((duc va) or (luc va)) hanh vi ((cua tre) or (cuu tre))*.