Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cua trong » cua truong, cua trung, qua trong
doc hieu » toc thieu, hoc hien
tang cua » mang cua, hang cua, tang luan
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac

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

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