Perhaps you should try some spelling variations:
nguoi thong » nguoi muong, nguoi thanh, nguoi cong
danh tranh » canh tranh, danh thanh, lanh tranh
khoa nguoi » hoa nguoi, khoe nguoi, khong nguoi
tranh hoc » thanh hoc, tranh cuoc, tranh duoc
sach khoa » bach khoa, sach nha, anh khoa
hoc thong » hoc thuong, hoc trong, hoc hong
hoc sach » hoc sinh, hoc cac, hoc anh
khoa hoc » hoa hoc
bach tri » bach mai, bao tri, bac tai
tri thuc » tri tue
te danh » le danh, tac danh
thuc va » thuc vat, thuc dan, thuc day
va khoa » vat khoa, van khoa, da khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te danh tranh hoc sach khoa hoc thong ) or ( vu bach tri thuc va khoa nguoi thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te danh tranh hoc sach khoa hoc thong ) OR ( vu bach tri thuc va khoa nguoi thong )).
• Adding a wildcard symbol may retrieve word variants: (( te danh tranh hoc sach khoa hoc thong ) or ( vu bach tri thuc va khoa nguoi thong ))*.