Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cham duc » pham duc, cham soc, pham duy
thanh ve » hanh ve, thanh va, thanh vien
va cham » va chat, va tham
cua tre » cua te, cua triet, dua tren
duc van » duc va, duc tan, duc manh
vu sach » vu bach, su sach, vu khach
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
cuu 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: vu sach y ((nang xa) OR (nang x)) hoi. hieu va cham duc van thanh ve ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((nang xa) OR (nang x)) hoi. hieu va cham duc van thanh ve ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang xa) OR (nang x)) hoi. hieu va cham duc van thanh ve ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang xa) OR (nang x)) hoi. hieu va cham duc van thanh ve ((cua tre) or (cuu tre))*.