Perhaps you should try some spelling variations:
thanh luan » tranh luan, thanh xuan, thanh tuan
nhung cong » dung cong, thong cong, hang cong
van nhung » van nhuong, va nhung, van hung
tay tieng » tap tieng, ta tieng, day tieng
va tieng » va tinh, tu tieng, va thong
ho lieu » so lieu, co lieu, ho chieu
ho kieu » so kieu, thi kieu, ho chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho lieu) OR (ho kieu)) tinh - thanh luan van nhung cong ((tay tieng) or (va tieng)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (ho kieu)) tinh - thanh luan van nhung cong ((tay tieng) OR (va tieng)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) OR (ho kieu)) tinh - thanh luan van nhung cong ((tay tieng) or (va tieng)) tap".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) OR (ho kieu)) tinh - thanh luan van nhung cong ((tay tieng) or (va tieng)) tap*.