Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hoang manh » hoang minh, hoang anh, hoang xanh
thieu sang » chieu sang, thieu khang, thieu quang
cua phuong » cuu phuong, cuc phuong, luan phuong
hoc thieu » toc thieu, hoc hien
hanh manh » hanh mang, lanh manh, thanh minh
cong tac » cong ty
tac trai » tam trai, khac trai, rac thai
trai cao » tai cao, thai cao, trai chan

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 - ((hanh manh) or (hoang manh)) cua phuong cong tac trai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh manh) OR (hoang manh)) cua phuong cong tac trai cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh manh) or (hoang manh)) cua phuong cong tac trai cao*.