Perhaps you should try some spelling variations:
lieu van » lieu va, hieu van, sieu van
su triet » su viet, ve triet
tham hoc » thai hoc, tham hoa, than hoc
van tham » van thanh, van tuan, van chat
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
su tien » su kien, su hien, tu tieng
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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) OR (ly nang)) ma hoi. lieu van tham hoc va hanh vi ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) ma hoi. lieu van tham hoc va hanh vi ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ly nang)) ma hoi. lieu van tham hoc va hanh vi ((su triet) or (su tien))".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ly nang)) ma hoi. lieu van tham hoc va hanh vi ((su triet) or (su tien))*.