Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
xuc va » duc va, tuc va, luc va

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 ma)) hoi. ((hieu ve) or (hieu van)) cam xuc va hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (hieu van)) cam xuc va hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (nang ma)) hoi. ((hieu ve) or (hieu van)) cam xuc va hanh doi cua tre*.