Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
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 chieu xanh - canh ((tranh va) OR (trinh va)) thong cong san ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - canh ((tranh va) OR (trinh va)) thong cong san ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - canh ((tranh va) OR (trinh va)) thong cong san ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh ((tranh va) OR (trinh va)) thong cong san ((toan cau) or (toan ban))*.