Perhaps you should try some spelling variations:
thuyet danh » thuyet dan, khuyet danh, thuyet canh
thuyet anh » thuyet kinh, thuy anh, thuyet dan
thanh tung » thanh cong
cua trong » cua truong, cua trung, qua trong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan 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 ((thuyet danh) or (thuyet anh)) - ((thanh trung) OR (thanh tung)) cua trong cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thuyet danh) OR (thuyet anh)) - ((thanh trung) OR (thanh tung)) cua trong cong dan than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thuyet danh) or (thuyet anh)) - ((thanh trung) OR (thanh tung)) cua trong cong dan than tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thuyet danh) or (thuyet anh)) - ((thanh trung) OR (thanh tung)) cua trong cong dan than tap*.