Perhaps you should try some spelling variations:
thanh vi » thanh va, thanh ve, nhanh vi
su sach » so sach, vu sach
so giao » so giai, hoc giao
sach ky » sac ky, sach y, sach ty
cu tren » tu tren, dua tren
toc gia » toc giay, tac gia, quoc gia
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang

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