Perhaps you should try some spelling variations:
thieu tinh » chieu tinh, thien tinh, lieu tinh
hanh thong » anh thong, hanh trong, hang thong
thong qua » thong quan, thong cua, thong tu
qua dang » cua dang, qua dung, qua dan
cong dan » cong san, cong tan, cong dong
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 ((thieu tinh) OR (trieu tinh)) - hanh thong qua dang ((cong dan) or (huong dan)) than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (trieu tinh)) - hanh thong qua dang ((cong dan) OR (huong dan)) than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (trieu tinh)) - hanh thong qua dang ((cong dan) or (huong dan)) than tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) OR (trieu tinh)) - hanh thong qua dang ((cong dan) or (huong dan)) than tap*.