Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, chao xu, chat cua
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
tai cau » tai cac, tai cao
tu sach » thu sach, su sach, te sach

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 ty ((nang xa) or (nang x)) hoi. hieu van ((chat xuc) OR (cam xuc)) van hanh tai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang x)) hoi. hieu van ((chat xuc) OR (cam xuc)) van hanh tai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (nang x)) hoi. hieu van ((chat xuc) OR (cam xuc)) van hanh tai cau treo".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (nang x)) hoi. hieu van ((chat xuc) OR (cam xuc)) van hanh tai cau treo*.