Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thien » hoc hien, hoc thieu, hoc thiet
trang va » tran van, hang va
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan 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 thien hach - hanh trang va nhung ((cong dan) OR (cong san)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - hanh trang va nhung ((cong dan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh trang va nhung ((cong dan) OR (cong san)) toan cao*.