Perhaps you should try some spelling variations:
thuat canh » thuat lanh, thuat cong, thuat san
doanh khoa » toan khoa
hoa doanh » toan doanh, hoa dan
canh hoc » anh hoc, cach hoc, danh hoc
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoa » mon hoc, dong hoa, cong hoa
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat canh hoc tap, nghien cuu mon hoa doanh khoa hoc ((ma hoi) OR (mai hoi)) van nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat canh hoc tap, nghien cuu mon hoa doanh khoa hoc ((ma hoi) OR (mai hoi)) van nhan dan".
• Adding a wildcard symbol may retrieve word variants: thuat canh hoc tap, nghien cuu mon hoa doanh khoa hoc ((ma hoi) OR (mai hoi)) van nhan dan*.