Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
thieu xanh » chieu xanh, hieu manh, thien anh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh van » trinh han, trinh quan, trinh toan
van hung » van dung, manh hung, van duong
cong dan » cong san, cong tan, cong dong
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 ((thieu xanh) or (hieu lang)) - thanh trinh van hung ((cong dan) OR (huong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu lang)) - thanh trinh van hung ((cong dan) OR (huong dan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu lang)) - thanh trinh van hung ((cong dan) OR (huong dan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu lang)) - thanh trinh van hung ((cong dan) OR (huong dan)) toan tap*.