Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
te sach » toc sach
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va cham » va chat, va tham
y dang » ky dang, 2 dang, _ dang
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 hoi. hieu va cham tuc ((van hanh) OR (ban 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 hoi. hieu va cham tuc ((van hanh) OR (ban 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 hoi. hieu va cham tuc ((van hanh) OR (ban hanh)) vi ((cua te) or (cua cu))".
• Adding a wildcard symbol may retrieve word variants: te sach y dang xa hoi. hieu va cham tuc ((van hanh) OR (ban hanh)) vi ((cua te) or (cua cu))*.