Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh via » hanh vi, hanh va, anh va
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
via cua » gia cua, gian cua, giau cua
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
ve cac » vien cac
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: tu sach ty nang ((o hoi) or (x ho)). hieu ((ve cac) or (va cac)) xuc van hanh via cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((o hoi) OR (x ho)). hieu ((ve cac) OR (va cac)) xuc van hanh via cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((o hoi) or (x ho)). hieu ((ve cac) or (va cac)) xuc van hanh via cua triet*.