Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
luc van » luoc van, luu van, duc van
hang di » hang doi, hang vi, hang dien
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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 ma hoi. hieu ve cham luc van ((hanh vi) or (hang di)) ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ma hoi. hieu ve cham luc van ((hanh vi) OR (hang di)) ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ma hoi. hieu ve cham luc van ((hanh vi) or (hang di)) ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ma hoi. hieu ve cham luc van ((hanh vi) or (hang di)) ((cua te) OR (cua tu))*.