Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
hanh sinh » hanh dinh, hinh sinh, hanh chinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
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) OR (hanh tinh)) 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) OR (hanh tinh)) cua ((nhung cong) OR (thong cong)) tan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh sinh) OR (hanh tinh)) cua ((nhung cong) or (thong cong)) tan phan dau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh sinh) OR (hanh tinh)) cua ((nhung cong) or (thong cong)) tan phan dau*.