Perhaps you should try some spelling variations:
thu sac » thu sach, thu san, thu xac
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua thuoc, luat tuc
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve cac
luc va » tuc va, loc va
cua tu » cua su, cua cu, cua te

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 xa hoi. hieu ve cao ((luc va) or (duc va)) nhan vien ((cua tuc) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang xa hoi. hieu ve cao ((luc va) OR (duc va)) nhan vien ((cua tuc) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang xa hoi. hieu ve cao ((luc va) or (duc va)) nhan vien ((cua tuc) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang xa hoi. hieu ve cao ((luc va) or (duc va)) nhan vien ((cua tuc) OR (cua tu))*.