Perhaps you should try some spelling variations:
nhanh thanh » phan thanh, nhanh tinh
thanh thanh » thanh toan, thanh phan, phan thanh
thong cong » trong cong, tong cong, thong thong
hieu cach » hieu cac, chieu sach, hieu ca
doc hieu » toc thieu, hoc thieu, hoc hien
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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: doc hieu cach - ((thanh thanh) or (nhanh thanh)) va thong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu cach - ((thanh thanh) OR (nhanh thanh)) va thong cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu cach - ((thanh thanh) or (nhanh thanh)) va thong cong tan toan ban*.