Perhaps you should try some spelling variations:
su triet » su tien, ve triet
tham hoc » thai hoc, tham hoa, than hoc
su sach » so sach, vu sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
va tham » van tham, va cham, va thanh
su viet » so viet
y nang » ky nang, ly nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang

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