Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang xay » dang xay, nganh xay, nang xuan
hieu van » hieu va, thien van, hieu ve
dinh sai » dinh tai, danh sai, dinh hai
ve triet » va trien, su triet
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
va dinh » van dinh, va kinh, va tinh
cua tuc » cua duc, cua tu, cua thuoc
xuc va » duc va, tuc va, luc va

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 nang xay hoi. ((hieu van) or (lieu va)) cam xuc va dinh sai ((ve triet) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xay hoi. ((hieu van) OR (lieu va)) cam xuc va dinh sai ((ve triet) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xay hoi. ((hieu van) or (lieu va)) cam xuc va dinh sai ((ve triet) or (cua tuc))*.