Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
thong va » thong cua, truong va, thong qua
toan cao » toan tap
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 xanh) or (chieu sang)) - canh tranh cua thong thong va ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu sang)) - canh tranh cua thong thong va ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu sang)) - canh tranh cua thong thong va ((toan cao) or (toan ban))*.