Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
xay hoi » xa hoi, cay phoi, gay thoi
tay hoi » tay ho, tao hoi, tay thai
hieu va » lieu va, hieu qua
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
vi cua » vai cua, di cua
cua te » cua tu
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: te sach y dang ((xay hoi) OR (tay hoi)). ((hieu va) or (hieu van)) cam tuc van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y dang ((xay hoi) OR (tay hoi)). ((hieu va) OR (hieu van)) cam tuc van hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y dang ((xay hoi) OR (tay hoi)). ((hieu va) or (hieu van)) cam tuc van hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach y dang ((xay hoi) OR (tay hoi)). ((hieu va) or (hieu van)) cam tuc van hanh vi cua te*.