Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
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 sach ky nang o hai. hieu ve cam ((xuc van) or (duc van)) hanh thai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hai. hieu ve cam ((xuc van) OR (duc van)) hanh thai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hai. hieu ve cam ((xuc van) or (duc van)) hanh thai cua triet*.