Perhaps you should try some spelling variations:
cham truc » cau truc, pham thuc, nam truc
cua triet » su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

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

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