Perhaps you should try some spelling variations:
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
lang ha » long ha
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
y lang » o lang, _ lang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
ve nam » he nam, va nam, le nam
va dan » ca dan, va dao, va dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang ha hoi. hieu ve nam thu ((va hanh) OR (va dan)) vi ((ve triet) OR (cua vat))~.
• Adding a wildcard symbol may retrieve word variants: tu sach y lang ha hoi. hieu ve nam thu ((va hanh) or (va dan)) vi ((ve triet) or (cua vat))*.