Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
sach thu » sach thue, sach thieu, sach tham
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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 thu ((nang xa) or (lang xa)) hoi. ((hieu van) OR (hieu va)) cam xuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((nang xa) OR (lang xa)) hoi. ((hieu van) OR (hieu va)) cam xuc va hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((nang xa) or (lang xa)) hoi. ((hieu van) OR (hieu va)) cam xuc va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((nang xa) or (lang xa)) hoi. ((hieu van) OR (hieu va)) cam xuc va hanh di cua tre*.