Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tinh voi » trinh voi, tinh doi, binh voi
cua tre » cuu tre, cua triet, dua tren
va tinh » may tinh
van cam » van nam, van lam, van cau
sach tu » sach thu, cach tu, sach ty
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tu ((nang xa) or (nang ma)) hoi. hieu van cam xuc va tinh voi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu ((nang xa) OR (nang ma)) hoi. hieu van cam xuc va tinh voi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tu ((nang xa) or (nang ma)) hoi. hieu van cam xuc va tinh voi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sach tu ((nang xa) or (nang ma)) hoi. hieu van cam xuc va tinh voi ((cua tre) OR (cua te))*.