Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
ve chinh » te chinh, va chinh, che chinh
va thanh » gia thanh, ban thanh, va tinh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
va cham » va chat, va tham

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 ky dang xa hoi. hieu ((ve chinh) or (va cham)) thuc va thanh dat ((va triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ((ve chinh) OR (va cham)) thuc va thanh dat ((va triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ((ve chinh) or (va cham)) thuc va thanh dat ((va triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ((ve chinh) or (va cham)) thuc va thanh dat ((va triet) OR (ve triet))*.