Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
hanh han » hanh nhan, hanh phan, hanh san
van dung » van dong, xay dung, tin dung
cong van » cong vang, cong san, song van
va dung » va duong, vat dung, va ung
van tan » van tuan, van ban, van tai
tan cua » than cua, tang cua, toan cua

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 anh)) - hanh han ((va dung) OR (van dung)) cong van tan cua~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh han ((va dung) OR (van dung)) cong van tan cua~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh han ((va dung) OR (van dung)) cong van tan cua*.