Perhaps you should try some spelling variations:
trong tuan » trung tuan, trong tan, trang tuan
trong quan » thong quan, tong quan, thong quang
nhung cong » dung cong, thong cong, hang cong
hien tinh » khien tinh, thien tinh, bien tinh
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
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 hien tinh - hanh ((trong tuan) OR (trong quan)) nhung cong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - hanh ((trong tuan) OR (trong quan)) nhung cong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien tinh - hanh ((trong tuan) OR (trong quan)) nhung cong dan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - hanh ((trong tuan) OR (trong quan)) nhung cong dan ((toan cau) or (toan cao))*.