Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
hieu lang » chieu sang, hieu quang, nhieu tang
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
hanh han » hanh nhan, hanh phan, hanh san
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
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 - ((nhanh lang) or (hanh han)) he ((tong cong) or (dung cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((nhanh lang) OR (hanh han)) he ((tong cong) OR (dung cong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((nhanh lang) or (hanh han)) he ((tong cong) or (dung cong)) dan toan cao*.