Perhaps you should try some spelling variations:
sang than » cang thang, dang thanh, sang tao
thu sach » tu sach, thuat sach, thuoc sach
lang mai » lang dai, lang hai, lang man
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
va dung » van dung, va duong, vat dung
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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 ky ((lang mai) or (sang than)) hoi. hieu ve cam xuc va dung tai ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((lang mai) OR (sang than)) hoi. hieu ve cam xuc va dung tai ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((lang mai) or (sang than)) hoi. hieu ve cam xuc va dung tai ((cuu tre) or (cua tre))*.