Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc nhiet, hoc hien, hoc viet
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh vap » tranh va, tranh van, tranh chap
vap nhung » va nhung, ve nhung, voi nhung
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chiet) or (hoc thiet)) tach - canh tranh vap nhung cong san ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (hoc thiet)) tach - canh tranh vap nhung cong san ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chiet) or (hoc thiet)) tach - canh tranh vap nhung cong san ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ((hoc chiet) or (hoc thiet)) tach - canh tranh vap nhung cong san ((toan cau) OR (toan cao))*.