Perhaps you should try some spelling variations:
sach tham » sach nha
cau treo » cau theo, cau tren, cau triet
doanh va » doan va, doanh tai, doanh cua
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
nang xa » lang xa, nang ma, mang xa
ve pham » vi pham, ve phan, ve phat
v pham » vi pham, d pham
duy va » duy vat, duy van, day va
va cau » van cau, va cac, va dau

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 tham ((nang xa) or (nang x)) hoi. hieu ((ve pham) OR (v pham)) duy va doanh va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tham ((nang xa) OR (nang x)) hoi. hieu ((ve pham) OR (v pham)) duy va doanh va cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tham ((nang xa) or (nang x)) hoi. hieu ((ve pham) OR (v pham)) duy va doanh va cau treo".
• Adding a wildcard symbol may retrieve word variants: tu sach tham ((nang xa) or (nang x)) hoi. hieu ((ve pham) OR (v pham)) duy va doanh va cau treo*.