Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trinh ban » trinh han, trinh san, trinh dan
anh dang » anh dong, anh bang, anh danh
anh dung » anh dong, anh huong, sach dung
ban cong » bang cong, van cong, phan cong
ban cau » bang cau, ban can, van cau

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 - ((((anh dang) OR (anh dung))) or (nhanh quang)) cua ban cong trinh ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((((anh dang) OR (anh dung))) OR (nhanh quang)) cua ban cong trinh ban cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((((anh dang) OR (anh dung))) or (nhanh quang)) cua ban cong trinh ban cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((((anh dang) OR (anh dung))) or (nhanh quang)) cua ban cong trinh ban cau*.