Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
thong dong » thong duong, thuong dong, thong cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
van thanh » ban thanh, van tuan
thanh tai » thanh hai, thanh toan, doanh tai
tung cua » trung cua, tuong cua, tang cua
dung cua » dung luan, dung cho
dong van » duong van, dang van, dong von

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