Perhaps you should try some spelling variations:
trinh phan » trinh han, trinh quan, thanh phan
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
anh bang » anh hoang, anh quang, tinh bang
bang xay » dang xay, bang may, bang tay
phan cau » phan dau, phan cac, phan tu

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 sang - anh bang xay dung cong trinh phan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - anh bang xay dung cong trinh phan cau*.