Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
su triet » su viet, ve triet
dung sai » dung tai, dung va, dung dat
cham xuc » cam xuc, chat xuc, cham soc
sach ky » sac ky, sach y, sach ty
su tien » su kien, su hien, tu tieng
va dung » van dung, va duong, vat dung
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » 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 lang xa hoi. hieu va cham xuc va dung sai ((((su triet) OR (su tien))) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky lang xa hoi. hieu va cham xuc va dung sai ((((su triet) OR (su tien))) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky lang xa hoi. hieu va cham xuc va dung sai ((((su triet) OR (su tien))) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. hieu va cham xuc va dung sai ((((su triet) OR (su tien))) or (cua tu))*.