Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh nam » thanh tam, thanh pham, thanh nhan
thanh lam » thanh lap, hanh lam, thanh tam
hanh nam » hanh lam, hanh ngay, hoang nam
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
van cau » van dau, van hau, van chat
ty nang » ky nang, ty xang, ty hang
cau duc » cao duc, cau luc, chu duc
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 sach ty nang o hai. hieu van cau duc va ((thanh lam) or (((thanh nam) OR (hanh nam)))) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang o hai. hieu van cau duc va ((thanh lam) OR (((thanh nam) OR (hanh nam)))) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang o hai. hieu van cau duc va ((thanh lam) or (((thanh nam) OR (hanh nam)))) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hai. hieu van cau duc va ((thanh lam) or (((thanh nam) OR (hanh nam)))) cua triet*.