Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
phung cao » phung van, nhung cau, phung ho
hung cao » hung dao, nung cao, hung ca
cong tan » cong tac, cong san, cong thanh
toan tap » toan ban
phan tap » phan lap, han tap, pha tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - manh ((hung cao) OR (phung cao)) thuong cong tan ((toan tap) or (phan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - manh ((hung cao) OR (phung cao)) thuong cong tan ((toan tap) OR (phan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - manh ((hung cao) OR (phung cao)) thuong cong tan ((toan tap) or (phan tap))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - manh ((hung cao) OR (phung cao)) thuong cong tan ((toan tap) or (phan tap))*.