Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
tranh cua » manh cua
doanh cua » doanh luan
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (chieu xanh)) - canh ((tranh cua) or (doanh cua)) thong cong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - canh ((tranh cua) OR (doanh cua)) thong cong vang toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (chieu xanh)) - canh ((tranh cua) or (doanh cua)) thong cong vang toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (chieu xanh)) - canh ((tranh cua) or (doanh cua)) thong cong vang toan cao*.