Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su sach » so sach, vu sach
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
y dang » ky dang, 2 dang, _ dang
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y dang xay hoi. hieu va ((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: su sach y dang xay hoi. hieu va ((cac tuc) OR (cac toc)) va hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach y dang xay hoi. hieu va ((cac tuc) or (cac toc)) va hanh vi ((cua tre) or (cua te))*.