Perhaps you should try some spelling variations:
pham duy » pham duc
tinh van » trinh van, dinh van, tinh va
te sach » toc sach
ly nang » ly hang, ly vang, ly quang
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
va tinh » may tinh
van cua » vang cua, ban cua, dan cua
duy va » duy vat, duy van, day va
cua su » qua su
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ly nang) or (ky nang)) o hoi. hieu va pham duy va tinh van cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (ky nang)) o hoi. hieu va pham duy va tinh van cua su.
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) or (ky nang)) o hoi. hieu va pham duy va tinh van cua su*.