Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
thong dong » thong duong, thuong dong, thong cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh cua » tinh cua, trinh luat, trinh luan
toan cau » toan cao, toan ban, toan tap
co toan » co ton, so toan, cong toan

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 dong co toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trinh cua) OR (trinh quan)) thong dong co toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trinh cua) or (trinh quan)) thong dong co toan cau*.