Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh sai » dinh tai, danh sai, dinh hai
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va
sang xa » song xa, lang xa, sang ma
ky sang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky sang xa hoi. ((hieu va) or (hieu qua)) cao xuc va dinh sai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky sang xa hoi. ((hieu va) OR (hieu qua)) cao xuc va dinh sai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky sang xa hoi. ((hieu va) or (hieu qua)) cao xuc va dinh sai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky sang xa hoi. ((hieu va) or (hieu qua)) cao xuc va dinh sai ((cua te) OR (cua tu))*.