Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
va triet » va trien, ve triet, cua triet
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
ve cham » ve chat, vu cham, ve chim
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
y lang » o lang, _ lang, tay lang
thiet » thieu

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 xa hoi. hieu ((ve cham) OR (va cham)) thuc va hanh dai ((va triet) OR (va thiet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ((ve cham) or (va cham)) thuc va hanh dai ((va triet) OR (va thiet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ((ve cham) or (va cham)) thuc va hanh dai ((va triet) OR (va thiet))*.