Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trung dai » truong dai, truong dao, trung cap
cheo cua » cho cua, chuoi cua, co cua
cua sinh » hoa sinh, va sinh
cong tac » cong ty
chat cao » chat co, chat cho, chat bao
cay cao » chay cao, cay co, tay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: cheo cua sinh - hanh ((trung dai) or (trung tam)) nhung cong tac ((chat cao) or (cay cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cheo cua sinh - hanh ((trung dai) OR (trung tam)) nhung cong tac ((chat cao) OR (cay cao)).
• Adding a wildcard symbol may retrieve word variants: cheo cua sinh - hanh ((trung dai) or (trung tam)) nhung cong tac ((chat cao) or (cay cao))*.