Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
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 cham » va chat, va tham
va tinh » may tinh
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 cham duc va tinh van ((cua su) OR (qua 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 cham duc va tinh van ((cua su) OR (qua 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 cham duc va tinh van ((cua su) OR (qua su))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) or (ky nang)) o hoi. hieu va cham duc va tinh van ((cua su) OR (qua su))*.