Perhaps you should try some spelling variations:
canh trinh » hanh trinh, canh tinh, anh trinh
than thong » than thuong, toan thong, tran thong
bach khoa » anh khoa
khoa than » khoa luan, hoa thai, hoa tan
trinh thi » trinh tai, dinh thi, trinh tu
phan hong » phan cong, pham hong, phan song
tranh vu » tran vu, tranh va, tranh cua
hoa phan » hoa dan, co phan
te canh » ve canh, te danh, re canh
su canh » suc canh, su can, su anh
thi anh » thi hanh, thi thanh, thich anh
anh hoa » anh khoa, danh hoa, hanh hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te canh tranh vu bach khoa than thong ) or ( su canh trinh thi anh hoa phan hong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te canh tranh vu bach khoa than thong ) OR ( su canh trinh thi anh hoa phan hong )).
• Adding a wildcard symbol may retrieve word variants: (( te canh tranh vu bach khoa than thong ) or ( su canh trinh thi anh hoa phan hong ))*.