Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh dung » thanh duong, thanh tung, thanh hung
cong trong » cong thuong, duong trong, cong trinh
hoc thieu » toc thieu, hoc hien
dung khoa » dung cho
khoa cong » hoa cong, khoe cong, hoc cong
tac khang » tao khang, bach khang, van khang
tan khang » van khang, tao khang, tinh khang

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 - thanh dung khoa cong trong ((tac khang) or (tan khang)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh dung khoa cong trong ((tac khang) OR (tan khang)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh dung khoa cong trong ((tac khang) or (tan khang)) cau*.