Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
thieu sang » chieu sang, thieu khang, thieu quang
nhanh lang » nhanh quang, nhan dang, nhanh dong
hoc thieu » toc thieu, hoc hien
cong cong » cong dong, trong cong, dung cong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban

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 - ((nhanh lang) OR (nhanh thang)) cua cong cong tan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((nhanh lang) OR (nhanh thang)) cua cong cong tan ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((nhanh lang) OR (nhanh thang)) cua cong cong tan ((toan cao) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((nhanh lang) OR (nhanh thang)) cua cong cong tan ((toan cao) or (toan tap))*.