Perhaps you should try some spelling variations:
thanh tung » thanh cong
tuan nhung » quan nhung, tuan hung, thuat nhung
hoc dien » hoc hien, hoc vien, hoc dieu
dien anh » tieng anh, dien dan
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan 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 dien anh - ((thanh trung) or (thanh tung)) tuan nhung ((cong dan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dien anh - ((thanh trung) OR (thanh tung)) tuan nhung ((cong dan) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dien anh - ((thanh trung) or (thanh tung)) tuan nhung ((cong dan) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc dien anh - ((thanh trung) or (thanh tung)) tuan nhung ((cong dan) OR (cong san)) toan cau*.