Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham tuc » nham thuc, pham thuc, tham thuc
dang xay » dang van, van xay
te sach » toc sach
tuc van » thuc van, truc van, tuc va
va cham » va chat, va tham
hieu va » lieu va, hieu qua
dang xa » lang xa, dang ha, dang va
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: te sach y ((dang xa) OR (dang xay)) hoi. hieu va cham tuc van hanh vi ((cua te) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((dang xa) OR (dang xay)) hoi. hieu va cham tuc van hanh vi ((cua te) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((dang xa) OR (dang xay)) hoi. hieu va cham tuc van hanh vi ((cua te) or (cua cu))".
• Adding a wildcard symbol may retrieve word variants: te sach y ((dang xa) OR (dang xay)) hoi. hieu va cham tuc van hanh vi ((cua te) or (cua cu))*.