Perhaps you should try some spelling variations:
sach tham » sach nha
phan duy » pham duy, phan huy, phan duc
phat duy » pham duy, phat huy, pham duc
vu sach » vu bach, su sach, vu khach
tinh di » tinh doi, trinh di, tinh da
va tinh » may tinh
hieu va » lieu va, hieu qua
lang ha » long ha
nang xa » nang x, lang xa, nang ma
di cua » dai cua, doi cua, de cua
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: vu sach tham ((nang xa) or (lang ha)) hoi. hieu va ((phat duy) OR (phan duy)) va tinh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tham ((nang xa) OR (lang ha)) hoi. hieu va ((phat duy) OR (phan duy)) va tinh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tham ((nang xa) or (lang ha)) hoi. hieu va ((phat duy) OR (phan duy)) va tinh di cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach tham ((nang xa) or (lang ha)) hoi. hieu va ((phat duy) OR (phan duy)) va tinh di cua te*.