Perhaps you should try some spelling variations:
phan thanh » pham thanh, ban thanh, van thanh
thanh lanh » thanh anh, thanh lan, thanh thanh
thong cong » trong cong, tong cong, thong thong
thang long » thanh cong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
doc hieu » toc thieu, hoc thieu, hoc hien
van han » van hanh, van phan, van nhan
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - phan thanh lanh ((thong cong) or (thang long)) van han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - phan thanh lanh ((thong cong) OR (thang long)) van han tap.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - phan thanh lanh ((thong cong) or (thang long)) van han tap*.