Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » hanh trinh, hanh trang, lanh tranh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
thanh lap » thanh san, phan lap, thanh hai
cong van » cong vang, cong san, song van
than cap » khan cap, thanh cac, than cua

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