Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
thanh tung » thanh cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tac thanh » bac thanh, tcc thanh, tuc thanh
cac thanh » bac thanh, cach nhanh, ban thanh
tung cua » trung cua, tuong cua, dung cua
ban cong » bang cong, van cong, phan cong

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 (hieu manh)) - thanh tung cua ban cong ((tac thanh) OR (cac thanh)) hoa~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh tung cua ban cong ((tac thanh) OR (cac thanh)) hoa.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - thanh tung cua ban cong ((tac thanh) OR (cac thanh)) hoa".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - thanh tung cua ban cong ((tac thanh) OR (cac thanh)) hoa*.