Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
chieu tinh » trieu tinh, lieu tinh, chau tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
manh cua » doanh cua, ban cua
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu tinh - canh manh cua ((nhung cong) or (dung cong)) dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - canh manh cua ((nhung cong) OR (dung cong)) dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - canh manh cua ((nhung cong) or (dung cong)) dan ((toan cao) or (toan ban))*.