Perhaps you should try some spelling variations:
thanh vi » thanh va, thanh ve, nhanh vi
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu 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 gia » so giai, so giao, ho gia

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 xa hoi. hieu va cham ((toc gia) or (so gia)) ((thanh vi) OR (hanh vi)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu va cham ((toc gia) OR (so gia)) ((thanh vi) OR (hanh vi)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu va cham ((toc gia) or (so gia)) ((thanh vi) OR (hanh vi)) cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu va cham ((toc gia) or (so gia)) ((thanh vi) OR (hanh vi)) cau tren*.