Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ve triet » va trien, su triet
cham tuc » nham thuc, pham thuc, tham thuc
thi nang » thi cong, thi hanh
van hang » van khang, van hoang, van thang
hang vi » hang va, hanh vi, hang di
tuc van » thuc van, truc van, tuc va
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
ki nang » ky nang
ve cham » va cham, ve chat, vu cham

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thi nang) OR (ki nang)) xa hoi. hieu ve cham tuc van hang vi ((cua triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thi nang) OR (ki nang)) xa hoi. hieu ve cham tuc van hang vi ((cua triet) or (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: so sach ((thi nang) OR (ki nang)) xa hoi. hieu ve cham tuc van hang vi ((cua triet) or (ve triet))*.