Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
pham duy » pham duc
tinh dai » trinh dai, tinh da, tinh hai
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
lang ha » long ha
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
va tinh » may tinh
duy va » duy vat, duy van, day 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: vu sach thu ((nang xa) or (lang ha)) hoi. hieu va pham duy va tinh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thu ((nang xa) OR (lang ha)) hoi. hieu va pham duy va tinh dai cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach thu ((nang xa) or (lang ha)) hoi. hieu va pham duy va tinh dai cua te*.