Perhaps you should try some spelling variations:
trinh viet » ninh viet, trinh vat
su triet » su viet, su tien, ve triet
tham soc » cham soc, tham nuoc, thai son
danh vi » hanh vi, dinh vi, danh di
so sach » bo sach, co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
va tham » van tham, va cham, va thanh
ma hoi » mai hoi, xa hoi, ma hoa
soc va » hoc va, loc va, doc va
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (so sanh)) y nang ma hoi. lieu va tham soc va ((danh vi) or (trinh viet)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y nang ma hoi. lieu va tham soc va ((danh vi) OR (trinh viet)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) y nang ma hoi. lieu va tham soc va ((danh vi) or (trinh viet)) su triet*".