Perhaps you should try some spelling variations:
giao hanh » giao thanh, gia hanh, gian thanh
cau treo » cau theo, cau tren, cau triet
sach thu » sach thue, sach tham, cach thuc
dang xay » dang van, van xay
mang xa » lang xa, mang may, mang cua
hieu ve » hieu va, hieu van
du giao » duc giao, su giao, tu giao
ve cac » va cac, vien cac
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: su ((sach thu) OR (sach thieu)) ((mang xa) or (dang xay)) hoi. hieu ve cac du giao hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach thieu)) ((mang xa) OR (dang xay)) hoi. hieu ve cac du giao hanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thu) OR (sach thieu)) ((mang xa) or (dang xay)) hoi. hieu ve cac du giao hanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: su ((sach thu) OR (sach thieu)) ((mang xa) or (dang xay)) hoi. hieu ve cac du giao hanh vi cau treo*.