Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh sinh » hanh tinh, hanh dinh, hinh sinh
sinh cua » manh cua, dinh cuu, sinh va
tan phan » toan phan, than phan, van phan
phan dau » phan tu, hang dau
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh sinh cua ((nhung cong) or (thong cong)) tan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh sinh cua ((nhung cong) OR (thong cong)) tan phan dau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh sinh cua ((nhung cong) or (thong cong)) tan phan dau*.