Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trung » thanh trung, hanh trang, manh trung
trinh toan » tinh toan, thanh toan, trinh quan
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
trinh han » trinh quan
doc hieu » toc thieu, hoc thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) cac - hanh trung cua nhung cong ((trinh toan) or (trinh han)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) cac - hanh trung cua nhung cong ((trinh toan) OR (trinh han)) cao.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) cac - hanh trung cua nhung cong ((trinh toan) or (trinh han)) cao*.