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