Perhaps you should try some spelling variations:
van hoang » van hoan, quan hoang, tran hoang
su triet » su viet, ve triet
hoang di » hoang dai, hoang de, hang di
su sach » so sach, vu sach
xuc van » duc van, luc van, vuc van
su tien » su kien, su hien, tu tieng
cao hoi » cau hoi, co hoi, cao hoc
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao

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 y nang cao hoi. hieu ((ve cac) or (va cam)) xuc van hoang di ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoi. hieu ((ve cac) OR (va cam)) xuc van hoang di ((su triet) OR (su tien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang cao hoi. hieu ((ve cac) or (va cam)) xuc van hoang di ((su triet) OR (su tien))*".