Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thu sach » tu sach, thuat sach, thuoc sach
cau treo » cau theo, cau triet, cau trieu
hanh tai » hang tai, han tai, hinh tai
cau tren » cu tren, dau tren, ca tren
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty lang xa hoi. hieu va cao duc va ((hanh tai) or (thanh tai)) ((cau treo) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty lang xa hoi. hieu va cao duc va ((hanh tai) OR (thanh tai)) ((cau treo) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty lang xa hoi. hieu va cao duc va ((hanh tai) or (thanh tai)) ((cau treo) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ty lang xa hoi. hieu va cao duc va ((hanh tai) or (thanh tai)) ((cau treo) OR (cau tren))*.