Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
thong cong » tong cong, thong thong, phong chong
hien xanh » hien hanh, hien nhanh, hien khanh
tung cua » trung cua, tuong cua, dung cua
san van » tan van, luan van, tran van
van tu » van thu, van du, ban tu

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 xanh)) - thanh tung cua ((thong cong) or (trong cong)) san van tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - thanh tung cua ((thong cong) OR (trong cong)) san van tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (chieu xanh)) - thanh tung cua ((thong cong) or (trong cong)) san van tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (chieu xanh)) - thanh tung cua ((thong cong) or (trong cong)) san van tu*.