Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
ve coc » ve cuoc, ve cac, ve co
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (bo sach)) y lang xa hoi. hieu ve coc luc va hanh tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) y lang xa hoi. hieu ve coc luc va hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (bo sach)) y lang xa hoi. hieu ve coc luc va hanh tri cua tre*.