Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
than tap » han tap, phan tap, than cap
toan tap » toan ban
hoc thi » hoc thai, hoc chi, hoc khi
hoc tai » hoc dai, hoc tap, hoc bai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thi) OR (hoc tai)) thanh - hanh tang cua nhung cong dan ((than tap) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thi) OR (hoc tai)) thanh - hanh tang cua nhung cong dan ((than tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thi) OR (hoc tai)) thanh - hanh tang cua nhung cong dan ((than tap) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ((hoc thi) OR (hoc tai)) thanh - hanh tang cua nhung cong dan ((than tap) or (toan tap))*.