Perhaps you should try some spelling variations:
pham duy » pham duc
su sach » so sach, vu sach
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
tang ma » mang may, tang van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
duy va » duy vat, duy van, day va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly ((nang xa) or (tang ma)) hoi. hieu ve pham duy va ((hanh di) OR (hang di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((nang xa) OR (tang ma)) hoi. hieu ve pham duy va ((hanh di) OR (hang di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly ((nang xa) or (tang ma)) hoi. hieu ve pham duy va ((hanh di) OR (hang di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ly ((nang xa) or (tang ma)) hoi. hieu ve pham duy va ((hanh di) OR (hang di)) cua tre*.