Perhaps you should try some spelling variations:
vien cua » viec cua, dien cua, tien cua
thu sac » thu sach, thu san, thu xac
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
luc va » tuc va, loc va
cua te » cua tu
o hai » co hai, so hai, _ hai
o lai » o lao

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 ky nang ((o hai) or (o lai)). hieu ve cac ((luc va) or (duc va)) nhan vien cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang ((o hai) OR (o lai)). hieu ve cac ((luc va) OR (duc va)) nhan vien cua te.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang ((o hai) or (o lai)). hieu ve cac ((luc va) or (duc va)) nhan vien cua te*.