Perhaps you should try some spelling variations:
vien cua » viec cua, dien cua, tien cua
thu sac » thu sach, thu san, thu xac
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
nang o » nang ho, nang ro, nang x
ve cao » va cao, ve bao, ve cac
luc va » tuc va, loc va
cua te » cua tu

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) OR (nang co)) hai. 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 ky ((nang o) OR (nang co)) hai. 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 ky ((nang o) OR (nang co)) hai. hieu ve cao ((luc va) or (duc va)) nhan vien cua te".
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((nang o) OR (nang co)) hai. hieu ve cao ((luc va) or (duc va)) nhan vien cua te*.