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