Perhaps you should try some spelling variations:
shoi viet » hoi viet, thoai viet, hoc viet
loai viet » ngoai viet, hoa viet, luat viet
trinh le » thinh le, trinh he, trinh ke
cong soi » cong so, cong goi, cong noi
trinh do » trinh ky
mot loai » moi loai, mot ngoai, so loai
trinh ly » trinh ky, trinh tu, sinh ly
cot soi » cot loi
tay mot » tai mot, tay vuot
cac tay » cac cay, cac tac, cac tai
sanh va » hanh va, sinh va, anh va
co shoi » co hoi, co khoi
so viet » hoc viet
le dan » ke dan
dai va » mai va
co soi » co hoi, co loi, co doi
cac ty » cac ky, cac tu
dan va » doan va, dan ca, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( cong trinh le dan va cac tay ((co soi) or (((cot soi) OR (cong soi)))) viet nam ) or ( cong trinh ly dai va cac tay mot loai viet nam ))) or ((( cong trinh do sanh va cac ty co shoi viet nam ) or ( cong trinh do sanh va cac ty co so viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( cong trinh le dan va cac tay ((co soi) OR (((cot soi) OR (cong soi)))) viet nam ) OR ( cong trinh ly dai va cac tay mot loai viet nam ))) OR ((( cong trinh do sanh va cac ty co shoi viet nam ) OR ( cong trinh do sanh va cac ty co so viet nam ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( cong trinh le dan va cac tay ((co soi) or (((cot soi) OR (cong soi)))) viet nam ) or ( cong trinh ly dai va cac tay mot loai viet nam ))) or ((( cong trinh do sanh va cac ty co shoi viet nam ) or ( cong trinh do sanh va cac ty co so viet nam ))))*".