Perhaps you should try some spelling variations:
van pham » san pham, van phan, van phat
tinh van » trinh van, dinh van, tinh va
te sach » toc sach
ly nang » ly hang, ly vang, ly quang
va pham » va phat, va phap, va phan
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) OR (van 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) OR (van pham)) duy va tinh van cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly nang) or (ky nang)) o hoi. hieu ((va pham) OR (van 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) OR (van pham)) duy va tinh van cua su*.