Perhaps you should try some spelling variations:
sach tham » sach nha
cau treo » cau theo, cau tren, cau triet
doan van » doan va, hoang van, luan van
sach thu » sach thue, sach thieu, cach thuc
ve chat » va chat, van chat
van cau » van dau, van hau, van chat
va doan » va doanh, van doan, va dan
nang xa » nang x, lang xa, nang ma
ve cham » va cham, vu cham, ve chim

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