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 tren, cau triet
tay lang » tai lang, tay tang, tay quang
cam duc » cam xuc, cao duc, pham duc
ty lang » ty xang, ty hang, tu lang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam

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