Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
nhan tai » hang tai, van tai, toan tai
toan tap » toan ban
hanh va » hang va, hanh vi
han va » hang va, nhan va, ban va

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 ((han va) OR (hanh va)) thong cong dan ((nhan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((han va) OR (hanh va)) thong cong dan ((nhan tai) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh ((han va) OR (hanh va)) thong cong dan ((nhan tai) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((han va) OR (hanh va)) thong cong dan ((nhan tai) or (toan tap))*.