Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hoang manh » hoang minh, hoang anh, hoang xanh
thieu sang » chieu sang, thieu khang, thieu quang
cua thuong » cua truong, cua phuong, ca thuong
hoc thieu » toc thieu, hoc hien
hanh manh » hanh mang, lanh manh, thanh minh
cong tac » cong ty
trai cao » tai cao, trai chan, toan cao
thai cao » tai cao, thoai cac, thuat cao

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