Perhaps you should try some spelling variations:
thai hoc » dai hoc, bai hoc, hoi hoc
su triet » su tien, ve triet
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va thai » van thai, va tai, va tham
va danh » va dinh, va dan, va hanh
danh ki » danh di, danh kien, danh gia
su viet » so viet
y nang » ky nang, ly nang, v 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 ma hoi. lieu va thai hoc va danh ki ((su triet) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. lieu va thai hoc va danh ki ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. lieu va thai hoc va danh ki ((su triet) OR (su viet))*.