Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
thuc van » thuc vat, thuc dan, thuc va
tuc van » truc van, tuc va, duc van
cua tuc » cua duc, cua tu, cua thuoc
ve cham » va cham, ve chat, vu cham
xay hoi » xa hoi, tay hoi, cay phoi
ve cam » ve cac, va cam, ve cai
vi cua » vai cua, di cua

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