Perhaps you should try some spelling variations:
hong thuoc » khong thuoc, hong phuoc, dong thuoc
phan hong » phan cong, pham hong, phan song
thu cach » thuc cach, thu canh, tu cach
cach hoc » cach thuc, cach thoi, dich hoc
hoc phan » hoc dan, hoc pho
thuoc ma » hoc ma, duoc ma
hoi dan » hoa dan, hoc dan, thoi dai
mo hoc » mon hoc, co hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu cach hoc tap, nghien cuu mo hoc phan hong thuoc ma ((hoi dan) or (hoi dap)) luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cach hoc tap, nghien cuu mo hoc phan hong thuoc ma ((hoi dan) OR (hoi dap)) luan van.
• Adding a wildcard symbol may retrieve word variants: thu cach hoc tap, nghien cuu mo hoc phan hong thuoc ma ((hoi dan) or (hoi dap)) luan van*.