Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
dan hai » doan hai, dang hai, dan khai
nam dan » nam dinh
tuc nam » duc nam, cuc nam, luc nam
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
va cao » va co, va dao, va bao

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 y ((nang xa) or (nang x)) hoi. hieu ((va cac) or (va cao)) tuc nam dan hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang x)) hoi. hieu ((va cac) OR (va cao)) tuc nam dan hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (nang x)) hoi. hieu ((va cac) or (va cao)) tuc nam dan hai cua tre*.