Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thong cong » trong cong, tong cong, thong thong
canh tinh » hanh tinh, manh tinh, canh tranh
tan tranh » tan tran, can tranh, lan tranh
tranh ban » trinh ban, tranh hang, tranh luan
cong tan » cong tac, cong san, cong thanh
toan » tran

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

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