Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
ky danh » ky anh, ky dang
danh ca » dan ca, doanh cua, danh cho
hieu va » hieu qua
cac duc » cac du, cao duc, cac dac
anh hai » lanh hai, manh hai, anh thai
ca hoi » cau hoi, cua hoi, xa hoi
va anh » van anh, va hanh, va danh
hai su » hai vu, lai su, hai so

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 bach)) ky danh ca hoi. ((hieu va) OR (lieu va)) cac duc va anh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) ky danh ca hoi. ((hieu va) OR (lieu va)) cac duc va anh hai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu bach)) ky danh ca hoi. ((hieu va) OR (lieu va)) cac duc va anh hai su triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) ky danh ca hoi. ((hieu va) OR (lieu va)) cac duc va anh hai su triet*.