Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tao thiet » tai thiet, tay thiet, toan thiet
trang va » hang va
tran van » luan van
cong tap » cuong tap, cong tac, cong tan
tap van » tap va, tap vat, tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (tao thiet)) tach - hanh ((trang va) OR (tran van)) nhung cong tap van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (tao thiet)) tach - hanh ((trang va) OR (tran van)) nhung cong tap van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (tao thiet)) tach - hanh ((trang va) OR (tran van)) nhung cong tap van ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (tao thiet)) tach - hanh ((trang va) OR (tran van)) nhung cong tap van ban*.