Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
trang cho » trong cho, trang o, sang cho
cong ban » cong bang, cong san, cong tan
tran cao » toan cao, tran chau, tranh cac
san cua » sang cua, ban cua, nan cua
dan cua » dan ca, ban cua, dai cua

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 ((san cua) OR (dan cua)) khong cong ban ((tran cao) or (trang cho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((san cua) OR (dan cua)) khong cong ban ((tran cao) OR (trang cho)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh ((san cua) OR (dan cua)) khong cong ban ((tran cao) or (trang cho))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((san cua) OR (dan cua)) khong cong ban ((tran cao) or (trang cho))*.