Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh vai » hanh vi, hanh va, hanh tai
cuc ban » cua ban, cac ban, cuu ban
luc ban » duc ban, luc bat, luc van
tu sach » thu sach, te sach, tu cach
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
ha hoi » hoa hoi, ha noi, xa hoi
vai ve » va ve, dai ve, vai va

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) or (su sach)) ky lang ha hoi. lieu va cac ((luc ban) OR (cuc ban)) hanh vai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky lang ha hoi. lieu va cac ((luc ban) OR (cuc ban)) hanh vai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky lang ha hoi. lieu va cac ((luc ban) OR (cuc ban)) hanh vai ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky lang ha hoi. lieu va cac ((luc ban) OR (cuc ban)) hanh vai ve triet*.