Perhaps you should try some spelling variations:
giao hanh » giao thanh, gia hanh, gian thanh
cau treo » cau theo, cau tren, cau triet
cac dac » cac dan, cac dai, cac bac
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
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 ((sach ky) OR (sac ky)) lang xa hoi. hieu ve ((cac dac) or (cac du)) giao hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) lang xa hoi. hieu ve ((cac dac) OR (cac du)) giao hanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) lang xa hoi. hieu ve ((cac dac) or (cac du)) giao hanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) lang xa hoi. hieu ve ((cac dac) or (cac du)) giao hanh vi cau treo*.