Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
cau tren » cu tren, dau tren, ca tren
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cham » va chat, va tham
soc gia » toc gia, hoc gia, so gia
so giao » so giai, hoc giao
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu va cham ((soc gia) or (so giao)) thanh di cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang x hoi. hieu va cham ((soc gia) OR (so giao)) thanh di cau tren.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang x hoi. hieu va cham ((soc gia) or (so giao)) thanh di cau tren*.