Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghe cua
nghiep vua » nghiep va, nghiep vu
doanh hoan » doanh doanh, doanh khoa, doanh nhan
coc doanh » cac doanh, hoa doanh, cho doanh
van thanh » ban thanh, van tuan
sach dao » lanh dao
cong coc » cong cuoc, cong cac, cong co
hoan hoc » hoa hoc, toan hoc, hoang hoa
su sach » so sach, vu sach
dao tai » dao thai, dao tao, cao tai
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa hai

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 dao tai, ((nghien cua) or (nghiep vua)) cong coc doanh hoan hoc ma hai van thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach dao tai, ((nghien cua) OR (nghiep vua)) cong coc doanh hoan hoc ma hai van thanh san.
• Adding a wildcard symbol may retrieve word variants: su sach dao tai, ((nghien cua) or (nghiep vua)) cong coc doanh hoan hoc ma hai van thanh san*.