Perhaps you should try some spelling variations:
hanh trong » hanh trang, anh trong, hinh trong
hoat hang » hoan hoang, hoat dong, hoa lang
hoc sieu » hoc dieu, hoc thieu, hoc hien
hoc tieu » hoc thieu, hoc dieu, hoc tieng
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan ban

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

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