Perhaps you should try some spelling variations:
sach tham » sach nha
chat treo » cau treo, chat beo, chay tren
doanh van » doan van, doanh va, doanh ban
chat deo » chat co
va doanh » van doanh, vay doanh, va danh
pham duy » pham duc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve pham » vi pham, v pham, ve phan
duy va » duy vat, duy van, day va

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 duy va doanh van ((chat treo) OR (chat deo))~.
• 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 duy va doanh van ((chat treo) OR (chat deo)).
• 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 duy va doanh van ((chat treo) OR (chat deo))".
• Adding a wildcard symbol may retrieve word variants: tu sach tham ((nang xa) or (nang x)) hoi. hieu ve pham duy va doanh van ((chat treo) OR (chat deo))*.