Perhaps you should try some spelling variations:
cham trung » pham trung, pham truong, nam trung
vuc nang » cuc nang, vu nang, chuc nang
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va nang » van nang, da nang, cam nang
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
cua te » cua tu
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: vu sach ((y nang) or (vuc nang)) o hoi. hieu ve cham trung ((va nang) or (van dong)) doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((y nang) OR (vuc nang)) o hoi. hieu ve cham trung ((va nang) OR (van dong)) doi cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach ((y nang) or (vuc nang)) o hoi. hieu ve cham trung ((va nang) or (van dong)) doi cua te*.