Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach moi » sach doi, sach hoi, bach mai
cong hoa » dong hoa, hang hoa
dong hoc » dong co, dong luc
khoa hoc » hoa hoc
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
moi dap » hoi dap, doi dap, moi dan
hoa va » hoa van, hoa xa, hoa vo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach moi dap, nghien thu ((cong hoa) OR (dong hoc)) nganh khoa hoc ma hoa va thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach moi dap, nghien thu ((cong hoa) OR (dong hoc)) nganh khoa hoc ma hoa va thanh san".
• Adding a wildcard symbol may retrieve word variants: tu sach moi dap, nghien thu ((cong hoa) OR (dong hoc)) nganh khoa hoc ma hoa va thanh san*.