Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
cua nhung » va nhung
cua hang » cua dang, cua cong, cua ban
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: hoc ((chieu sang) or (hieu quang)) - hanh truong ((cua hang) OR (cua nhung)) cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu quang)) - hanh truong ((cua hang) OR (cua nhung)) cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu quang)) - hanh truong ((cua hang) OR (cua nhung)) cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu quang)) - hanh truong ((cua hang) OR (cua nhung)) cong tan toan cau*.