Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sang » chieu sach, chieu xanh, hieu lang
thong cua » thong quan, thong tu, huong cua
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu nganh) or (chieu sang)) - thanh ((thong cua) or (chung cu)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (chieu sang)) - thanh ((thong cua) OR (chung cu)) dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (chieu sang)) - thanh ((thong cua) or (chung cu)) dung cong tan toan cau*.