Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
dang xay » dang van, van xay
sach ty » sach y, sach tu, sach thu
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
cac tu » cac thu, cach tu, cac du
vi cau » va cau, ve cau, di cau

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