Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
cua tuc » cua duc, cua tu, cua thuoc
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
lang ha » long ha
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 ky ((lang ha) or (nang x)) hoi. hieu ve pham duc van thanh vi ((cua tuc) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang ha) OR (nang x)) hoi. hieu ve pham duc van thanh vi ((cua tuc) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang ha) or (nang x)) hoi. hieu ve pham duc van thanh vi ((cua tuc) or (cuu tre))*.