Perhaps you should try some spelling variations:
tham soc » cham soc, tham nuoc, thai son
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
va tham » van tham, va cham, va thanh
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
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 y nang ((ma hoi) or (ma hoa)). lieu va tham soc ((va danh) OR (va hanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((ma hoi) OR (ma hoa)). lieu va tham soc ((va danh) OR (va hanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((ma hoi) or (ma hoa)). lieu va tham soc ((va danh) OR (va hanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) or (ma hoa)). lieu va tham soc ((va danh) OR (va hanh)) vi su triet*.