Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
thong cong » trong cong, tong cong, thong thong
hien hach » thien hach, hien hanh, hien nhanh
trinh cua » trinh luat, trinh quan, trinh chat
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hach - hanh ((((trinh cua) OR (trinh luan))) OR (tinh cua)) thong cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hach - hanh ((((trinh cua) OR (trinh luan))) or (tinh cua)) thong cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hien hach - hanh ((((trinh cua) OR (trinh luan))) or (tinh cua)) thong cong dan toan cao*.