Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
trung tuan » trung thanh, trung tam, tran tuan
trong quan » thong quan, tong quan, thong quang
hoc thieu » toc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » 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 thieu manh - hanh ((trung tuan) or (trong quan)) nhung ((cong dan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - hanh ((trung tuan) OR (trong quan)) nhung ((cong dan) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu manh - hanh ((trung tuan) or (trong quan)) nhung ((cong dan) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - hanh ((trung tuan) or (trong quan)) nhung ((cong dan) OR (cong san)) toan cau*.