Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban danh » ban doanh, ban hanh, ban dan
danh ki » danh di, danh kien, danh gia
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
su sach » so sach
vu sach » vu bach, vu khach
ma hoi » mai hoi, ma hoa, me hoi
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang
ki su » ky 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 (xa hoi)). lieu va cam duc ban danh ki 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 (xa hoi)). lieu va cam duc ban danh ki 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 (xa hoi)). lieu va cam duc ban danh ki su triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) y nang ((ma hoi) or (xa hoi)). lieu va cam duc ban danh ki su triet*.