Perhaps you should try some spelling variations:
hoc thuyet » hoc chuyen
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc nhiet, hoc hien, hoc viet
hoc thiet » hoc thieu, hoc hien, toc thieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than ban » thanh ban, toan ban, than man

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) or (hoc thuyet)))) tach - canh tranh cua nhung cong van than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (((hoc thiet) OR (hoc thuyet)))) tach - canh tranh cua nhung cong van than ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc chiet) or (((hoc thiet) or (hoc thuyet)))) tach - canh tranh cua nhung cong van than ban*.