Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua ca, qua cai
qua cac » cua cac
tuc va » thuc va, truc va, tuc xa
vi va » vi van, vai va, vu va
thiet » thieu

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 ((qua cam) or (qua cac)) ((tuc va) or (duc va)) hanh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. hieu ((qua cam) OR (qua cac)) ((tuc va) OR (duc va)) hanh vi va thiet.
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. hieu ((qua cam) or (qua cac)) ((tuc va) or (duc va)) hanh vi va thiet*.