Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
cach thuc » anh thuc
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cac thu » cac thoi
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thieu nang x ho. hieu ve ((cac thu) OR (cach thuc)) ban thanh vi va trien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thieu nang x ho. hieu ve ((cac thu) OR (cach thuc)) ban thanh vi va trien".
• Adding a wildcard symbol may retrieve word variants: su sach thieu nang x ho. hieu ve ((cac thu) OR (cach thuc)) ban thanh vi va trien*.