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

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