Perhaps you should try some spelling variations:
cham luc » cham soc, cham cuu, chat lua
nhan luc » nang luc
tinh via » tinh gia, tinh va, tinh vi
so sanh » do sanh
va tinh » may tinh
ly hang » ly quang
cua tre » cuu tre, cua triet, dua tren
hieu vu » hieu va, hieu ve, hieu su
sanh ly » sinh ly, doanh ly, khanh ly
va hoi » xa hoi, va hoc, va hoa
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: so sanh ly hang va hoi. hieu vu ((cham luc) OR (nhan luc)) va tinh via ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ly hang va hoi. hieu vu ((cham luc) OR (nhan luc)) va tinh via ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ly hang va hoi. hieu vu ((cham luc) OR (nhan luc)) va tinh via ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sanh ly hang va hoi. hieu vu ((cham luc) OR (nhan luc)) va tinh via ((cua tre) or (cua te))*.