Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh hai » thanh hoa, thanh san
te sach » toc sach
duc van » duc va, duc tan, duc manh
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
bo sach » co sach, hoc sach
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (bo sach)) ky nang o hoi. hieu ve pham duc van ((thanh hai) OR (thanh phan)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (bo sach)) ky nang o hoi. hieu ve pham duc van ((thanh hai) OR (thanh phan)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (bo sach)) ky nang o hoi. hieu ve pham duc van ((thanh hai) OR (thanh phan)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (bo sach)) ky nang o hoi. hieu ve pham duc van ((thanh hai) OR (thanh phan)) cua te*.