Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lang van » dang van, tang van, hoang van
su sach » so sach, vu sach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay
su tien » su kien, su hien, tu tieng
ve cac » va cac, vien cac
du va » dau va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((lang xa) or (lang van)) hoi. hieu ve cac du va hanh va ((cua triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang xa) OR (lang van)) hoi. hieu ve cac du va hanh va ((cua triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) or (lang van)) hoi. hieu ve cac du va hanh va ((cua triet) or (su tien))*.