Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
danh doi » danh di, thanh doi, dung doi
cac dac » cac dan, cac dai, cac bac
doi cua » dai cua, hoi cua
vu sach » vu bach, su sach, vu khach
va danh » va dinh, va dan, va hanh
cac duc » cac du, cao duc, cac nuoc
vu sac » vu san, va sac, vu cac
cua te » cua tu
nang o » nang co, nang ho, nang ro
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 sac) or (vu sach)) ky nang o hoi. hieu vien ((cac duc) or (cac dac)) va danh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sac) OR (vu sach)) ky nang o hoi. hieu vien ((cac duc) OR (cac dac)) va danh doi cua te.
• Adding a wildcard symbol may retrieve word variants: ((vu sac) or (vu sach)) ky nang o hoi. hieu vien ((cac duc) or (cac dac)) va danh doi cua te*.