Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thieu xanh » chieu xanh, hieu manh, thien anh
dong tuong » dong thuong, dong trong, dong duong
dong thong » thong thong, nong thon, dong thanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
sinh va » sinh vat, tinh va, dinh van
van van » tan van, san van, van vat

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

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