Perhaps you should try some spelling variations:
chuc ngan » chuc nganh, chuc nang, cua ngan
toc sach » hoc sach, doc sach, thuoc sach
sach dao » lanh dao
cuu cong » cua cong, thu cong, cac cong
cong coc » cong cuoc, cong cac, cong co
coc phan » co phan, hoc phan, cac phan
phan hoa » phan loai, phan phoi, phan hong
mai khoi » mai khoa, tai khoa, cac khoi
ngan dan » ngan danh, nhan dan, ngan han
dao tai » dao thai, dao tao, cao tai
mai hoi » dai hoi, lai hoi, mai doi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach dao tai, nghien cuu cong coc phan hoa hoc ((mai hoi) OR (mai khoi)) chuc ngan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach dao tai, nghien cuu cong coc phan hoa hoc ((mai hoi) OR (mai khoi)) chuc ngan dan".
• Adding a wildcard symbol may retrieve word variants: toc sach dao tai, nghien cuu cong coc phan hoa hoc ((mai hoi) OR (mai khoi)) chuc ngan dan*.