Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cao hoi » cau hoi, co hoi, cao hoc
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
dau cua » day cua, cau cua, dan cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
luc ca » luc cao, luc cua, luc va
ca dan » cac dan, ca dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang cao hoi. ((hieu vu) OR (hieu va)) cham luc ca dan ((dau cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang cao hoi. ((hieu vu) OR (hieu va)) cham luc ca dan ((dau cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang cao hoi. ((hieu vu) OR (hieu va)) cham luc ca dan ((dau cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang cao hoi. ((hieu vu) OR (hieu va)) cham luc ca dan ((dau cua) or (dai cua)) te*.