Perhaps you should try some spelling variations:
thien van » thi van
doc sach » hoc sach, toc sach, nuoc sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
va danh » va dinh, va dan, va hanh
van anh » van thanh, tuan anh, van minh
doi cua » dai cua, hoi cua
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: doc sach ty ((lang xa) or (van xay)) hoi. thien van cam xuc ((va danh) or (van anh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ty ((lang xa) OR (van xay)) hoi. thien van cam xuc ((va danh) OR (van anh)) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: doc sach ty ((lang xa) or (van xay)) hoi. thien van cam xuc ((va danh) or (van anh)) doi cua tre*.