Perhaps you should try some spelling variations:
thuyet danh » thuyet dan, khuyet danh, thuyet canh
thuyet anh » thuyet kinh, thuy anh, thuyet dan
dong thanh » truong thanh
thanh phan » thanh pho, thanh san, thanh toan
ninh nhan » ninh thuan, ninh thanh, trinh nhan
minh nhan » minh thanh, minh chanh, minh thang
thuc hung » thuc chung, thuc nhung, thuc dung
hung dong » huong dong, vung dong, dung dong
phan cac » nhan cach, phan dau, phan lap

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)) - ((ninh nhan) or (minh nhan)) thuc hung dong thanh phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thuyet danh) OR (thuyet anh)) - ((ninh nhan) OR (minh nhan)) thuc hung dong thanh phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thuyet danh) OR (thuyet anh)) - ((ninh nhan) or (minh nhan)) thuc hung dong thanh phan cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((thuyet danh) OR (thuyet anh)) - ((ninh nhan) or (minh nhan)) thuc hung dong thanh phan cac*.