Perhaps you should try some spelling variations:
danh viet » anh viet, ninh viet, nang viet
va thanh » gia thanh, ban thanh, va tinh
viet cua » viec cua, viet ca, viet qua
doc sac » doc sach, dac sac, hoc sach
nang xa » nang x, lang xa, nang ma
va tham » van tham, va cham, va thuat
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sac ky nang xa hoi. hieu ((va tham) or (va thanh)) thuc va danh viet cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sac ky nang xa hoi. hieu ((va tham) OR (va thanh)) thuc va danh viet cua tre.
• Adding a wildcard symbol may retrieve word variants: doc sac ky nang xa hoi. hieu ((va tham) or (va thanh)) thuc va danh viet cua tre*.