Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, thanh lap, thanh loi
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
ve cac » va cac, vien cac
cac bo » bac bo, cac co
bo van » vo van, so van, do van
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 ky nang o hoi. hieu ve cac bo van ((hanh lai) OR (hanh tai)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o hoi. hieu ve cac bo van ((hanh lai) OR (hanh tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hoi. hieu ve cac bo van ((hanh lai) OR (hanh tai)) cua triet*.