Perhaps you should try some spelling variations:
tham hoc » thai hoc, tham hoa, than hoc
su triet » su viet, su tien, ve triet
su sach » so sach
vu sach » vu bach, vu khach
va tham » van tham, va cham, va thanh
va dinh » van dinh, va kinh, va tinh
dinh vi » dinh ve, dinh viet, dinh tri
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
vi su » va su, ve su, ki su

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