Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
ve triet » su triet
va trien » va truyen, va thiet, va tuyen
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
hieu ha » hieu hoa, hieu va, hieu ca
thu ban » thu hang
y lang » o lang, _ lang, tay lang

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 y lang xa hoi. hieu ha nam thu ban thanh di ((ve triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y lang xa hoi. hieu ha nam thu ban thanh di ((ve triet) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: so sach y lang xa hoi. hieu ha nam thu ban thanh di ((ve triet) or (va trien))*.