Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
ve triet » va trien, su triet
dinh sai » dinh tai, danh sai, dinh hai
va dinh » van dinh, va kinh, va tinh
van lam » van nam
van cam » van nam, van cau, van dam
xay hoi » xa hoi, tay hoi, cay phoi
cua tuc » cua duc, cua tu, cua thuoc
xuc va » duc va, tuc va, luc va
y dang » ky dang, 2 dang, _ dang

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 y dang xay hoi. hieu ((van cam) OR (van lam)) xuc va dinh sai ((ve triet) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y dang xay hoi. hieu ((van cam) OR (van lam)) xuc va dinh sai ((ve triet) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y dang xay hoi. hieu ((van cam) OR (van lam)) xuc va dinh sai ((ve triet) or (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: toc sach y dang xay hoi. hieu ((van cam) OR (van lam)) xuc va dinh sai ((ve triet) or (cua tuc))*.