Perhaps you should try some spelling variations:
vien cua » viec cua, dien cua, tien cua
thu sac » thu sach, thu xac, thu dac
thu san » thuy san, thu ban, phu san
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
ve cao » va cao, ve bao, ve cac
luc va » tuc va, loc va
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: ((thu sac) OR (thu san)) ky nang o hoi. hieu ve cao ((luc va) or (duc va)) nhan vien cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu san)) ky nang o hoi. hieu ve cao ((luc va) OR (duc va)) nhan vien cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) OR (thu san)) ky nang o hoi. hieu ve cao ((luc va) or (duc va)) nhan vien cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sac) OR (thu san)) ky nang o hoi. hieu ve cao ((luc va) or (duc va)) nhan vien cua te*.