Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
cong ngang » cong nhan, cong quang, cong lang
hien hanh » dieu hanh
dien anh » tieng anh, dien dan
trung va » truong va, trang va, trung ha
toan cao » toan ban, toan tap
tan cao » tao cao, tay cao, tan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dien anh) or (hien hanh)) - thanh trung va nhung cong ngang ((tan cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien anh) OR (hien hanh)) - thanh trung va nhung cong ngang ((tan cao) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((dien anh) or (hien hanh)) - thanh trung va nhung cong ngang ((tan cao) or (toan cao))*.