Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
sach ty » sach y, sach tu, sach thu
xay hoi » tay hoi, cay phoi, gay thoi
va hanh » van hanh, va thanh, va danh
va cau » van cau, va cac, va dau
cac tu » cac thu, cach tu, cac du
ve cac » va cac, vien cac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sach ty)) dang ((xay hoi) OR (xa hoi)). hieu ve cac tu va hanh va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach ty)) dang ((xay hoi) OR (xa hoi)). hieu ve cac tu va hanh va cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sach ty)) dang ((xay hoi) OR (xa hoi)). hieu ve cac tu va hanh va cau treo*".