Perhaps you should try some spelling variations:
ve triet » va trien
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
su triet » su viet, su tien
hanh ki » hanh vi, hanh ky, hanh kien
qua ban » cua ban, qua quan
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac

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 van nang x ho. hieu ve cac ((duc tan) or (qua ban)) hanh ki ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach van nang x ho. hieu ve cac ((duc tan) OR (qua ban)) hanh ki ((su triet) OR (ve triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach van nang x ho. hieu ve cac ((duc tan) or (qua ban)) hanh ki ((su triet) OR (ve triet))*".