Perhaps you should try some spelling variations:
luong cong » dung cong, trong cong, cong cong
toan thuc » toan hoc, dan thuc, nhan thuc
tuan thu » van thu
ung cong » dung cong, duong cong, cuong cong
ban ve » ban va
ky cao » ky xao, ky bao, ky cho
ve ky » va ky, ke ky
tuyen » truyen, quyen

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

• Performing a fuzzy search may retrieve terms with similar spellings: tuyen tap ((tuan thu) or (toan thuc)) đe co ban ve ky cao ((ung cong) OR (luong cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen tap ((tuan thu) OR (toan thuc)) đe co ban ve ky cao ((ung cong) OR (luong cong)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tuyen tap ((tuan thu) or (toan thuc)) đe co ban ve ky cao ((ung cong) OR (luong cong))".
• Adding a wildcard symbol may retrieve word variants: tuyen tap ((tuan thu) or (toan thuc)) đe co ban ve ky cao ((ung cong) OR (luong cong))*.