Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
toc gia » toc giay, tac gia, quoc gia
so giao » hoc giao
cu tren » tu tren, dua tren
vi cu » vi su, vi xu, vi du

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 nang xa hoi. hieu va cham ((toc gia) or (((so giao) or (so giai)))) hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu va cham ((toc gia) OR (((so giao) OR (so giai)))) hanh vi cu tren.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu va cham ((toc gia) or (((so giao) or (so giai)))) hanh vi cu tren*.