Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
duc gia » quoc gia
hoc duc » hoc duoc, hoc nuoc, hoc thuc
su sach » so sach
nang co » nang cao, nang doc, nang noi
vu sach » vu bach, vu khach
co hoi » co hoc, co loi
va hoc » van hoc

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