Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
tieu dung » dieu duong, tin dung, viet dung
hang cua » mang cua, hang ca, huong cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
han cua » nhan cua, than cua, hanh cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (tieu dung)) - hanh ((han cua) OR (hang cua)) nhung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (tieu dung)) - hanh ((han cua) OR (hang cua)) nhung cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (tieu dung)) - hanh ((han cua) OR (hang cua)) nhung cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (tieu dung)) - hanh ((han cua) OR (hang cua)) nhung cong tan toan cao*.