Perhaps you should try some spelling variations:
thanh hoc » thanh hoa, than hoc, thanh ho
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
tu thanh » thu thanh, su thanh, ta thanh
cuu cong » cua cong, thu cong
cac cong » cua cong
nhan dan » phan dau, gian dan, nhan tai
va nhan » van nhan, ca nhan, va phan
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 thanh hoc tap, nghien ((cuu cong) OR (cac cong)) hoc nganh hoa hoc ma hoa va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu thanh hoc tap, nghien ((cuu cong) OR (cac cong)) hoc nganh hoa hoc ma hoa va nhan dan".
• Adding a wildcard symbol may retrieve word variants: tu thanh hoc tap, nghien ((cuu cong) OR (cac cong)) hoc nganh hoa hoc ma hoa va nhan dan*.