Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh tai » thanh hai, thanh toan, doanh tai
su sach » so sach, vu sach
te sach » toc 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
cuu tre » cua tre, cau tren, cau treo
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: ((su sach) or (te sach)) ky nang ma hoa. hieu vi pham duc van ((thanh van) or (thanh tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang ma hoa. hieu vi pham duc van ((thanh van) OR (thanh tai)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang ma hoa. hieu vi pham duc van ((thanh van) or (thanh tai)) cuu tre*.