Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
tuc van » thuc van, truc van, tuc va
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xay hoi » xa hoi, tay hoi, cay phoi
cua te » cua tu
cua cu » cua chu, cua cau, cua su

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