Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cham cuu » cap cuu, chat cua
cua viet » ca viet, hoa viet, cua vat
toc sac » toc sach, toc san, hoc sach
dan sai » danh sai, doan sai, dan tai
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
va dan » ca dan, va dao, va dau
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang o hoi. lieu va ((cham soc) or (cham cuu)) va dan sai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang o hoi. lieu va ((cham soc) OR (cham cuu)) va dan sai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang o hoi. lieu va ((cham soc) or (cham cuu)) va dan sai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang o hoi. lieu va ((cham soc) or (cham cuu)) va dan sai ((cua triet) OR (cua viet))*.