Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
doi hieu » doi chieu, doc hieu, doi hien
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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: doi hieu lang - hanh ((trung cua) OR (trung cap)) nhung cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - hanh ((trung cua) OR (trung cap)) nhung cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh ((trung cua) OR (trung cap)) nhung cong tan toan cao*.