Perhaps you should try some spelling variations:
tham hoc » thai hoc, tham hoa, than hoc
su triet » su viet, ve triet
su sach » so sach, vu sach
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, may nang
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)) xa hoi. lieu va 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 (v nang)) xa hoi. lieu va tham hoc va hanh vi ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) xa hoi. lieu va tham hoc va hanh vi ((su triet) or (su tien))*.