Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
tu sach » thu sach, su sach, tu cach
duc van » duc va, duc tan, duc manh
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo

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

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