Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
hien manh » hien hanh, tien manh, hieu manh
tang luan » dung luan
tang cua » mang cua, hang cua, thong cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van 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 hien manh - hanh ((((tang cua) OR (tang luan))) or (trung tuan)) nhung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - hanh ((((tang cua) OR (tang luan))) OR (trung tuan)) nhung cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - hanh ((((tang cua) OR (tang luan))) or (trung tuan)) nhung cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - hanh ((((tang cua) OR (tang luan))) or (trung tuan)) nhung cong dan toan ban*.