Perhaps you should try some spelling variations:
"vo nguyen giap - vien tuong " » "vo nguyen giap - vien truong " (Expand Search), "vo nguyen giap - vien thong " (Expand Search), "vo nguyen giap - hien tuong " (Expand Search), "ky nguyen giap - vien tuong " (Expand Search)
"vo nguyen giap - vien trong " » "vo nguyen giap - vien truong " (Expand Search), "vo nguyen giap - vien thong " (Expand Search), "vo nguyen giap - vien cong " (Expand Search), "ky nguyen giap - vien trong " (Expand Search)
quan nhan » quan nha (Expand Search), xuan nhan (Expand Search), quan thanh (Expand Search)
nhan tam » nhan tao (Expand Search), nhan tai (Expand Search), phan tam (Expand Search)

Try widening your search to All Fields.

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"vo nguyen giap - vien tuong \") OR (\"vo nguyen giap - vien trong \"))van đuc quan nhan tam\"\"".
• Removing quotes may allow a broader search: (( vo nguyen giap - vien tuong ) OR ( vo nguyen giap - vien trong ))van đuc quan nhan tam.