Perhaps you should try some spelling variations:
sach tren » sach tien, sach tranh
va triet » va thiet, va trien, ve triet
sach tri » sach tai, sach truc, sach bai
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
qua hac » qua hai, qua cac, qua hoat
nang xa » nang x, lang xa, nang ma
hac tuc » thac toc, thai tuc
hai va » hai van, thai va, hoi 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 tri) OR (sach tren)) nang xa hoi. hieu qua hac tuc ((va danh) or (va dinh)) hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tri) OR (sach tren)) nang xa hoi. hieu qua hac tuc ((va danh) OR (va dinh)) hai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tri) OR (sach tren)) nang xa hoi. hieu qua hac tuc ((va danh) or (va dinh)) hai va triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tri) OR (sach tren)) nang xa hoi. hieu qua hac tuc ((va danh) or (va dinh)) hai va triet*.