Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trong van » trong cac
lap dung » lan dung, cap dung, lam dung
ap dung » xay dung, van dung
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 - thanh trung ((lap dung) OR (ap dung)) trong van van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh trung ((lap dung) or (ap dung)) trong van van ban*.