Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, va danh
xay hoi » xa hoi, tay hoi, cay phoi
cac tuc » cac tu, cac tac, cac nuoc
cua tre » cuu tre, cua triet, dua tren
cac toc » cac toi, cac nuoc, cac thoi
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: vu sach y dang xay hoi. hieu van ((cac tuc) or (cac toc)) va hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y dang xay hoi. hieu van ((cac tuc) OR (cac toc)) va hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: vu sach y dang xay hoi. hieu van ((cac tuc) or (cac toc)) va hanh vi ((cua tre) or (cua te))*.