Perhaps you should try some spelling variations:
hoc trieu » hoc thieu, hoc tieu, hoc dieu
thong cua » thong quan, thong tu, huong cua
dang cong » dung cong
thong va » truong va, thong qua, thong xay
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 trieu tinh - hanh ((thong va) or (thong cua)) dang cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc trieu tinh - hanh ((thong va) OR (thong cua)) dang cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: hoc trieu tinh - hanh ((thong va) or (thong cua)) dang cong dan than tap*.