Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
thuc day » thuc vat
thuc dan » thuc hanh, hoc dan, thuc vat
danh dai » danh dau, danh di, danh sai
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. thien van chat ((thuc day) or (thuc dan)) danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. thien van chat ((thuc day) OR (thuc dan)) danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. thien van chat ((thuc day) or (thuc dan)) danh dai cua tre*.