Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thanh ve » hanh ve, thanh va, thanh vien
thanh vi » hanh vi, thanh va, nhanh vi
sach ky » sac ky, sach y, sach ty
so giao » so giai, hoc giao
su sach » so sach, vu sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
so gia » so giai, ho gia, co gia
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: su sach ky nang x hoi. hieu va cham ((so gia) or (so giao)) ((thanh vi) OR (thanh ve)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu va cham ((so gia) OR (so giao)) ((thanh vi) OR (thanh ve)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu va cham ((so gia) or (so giao)) ((thanh vi) OR (thanh ve)) cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu va cham ((so gia) or (so giao)) ((thanh vi) OR (thanh ve)) cau tren*.