Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua tham » qua cham, qua than, qua thanh
hanh tai » thanh tai, hang tai, han tai
ky lang » ky dang, ky tang, tay lang
van hoi » van hoa, van hoc, van hoe
tai cua » thai cua, tai cuc, tri cua
te sac » te sach, te cac, te san
luc va » tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ((ky lang) OR (ky nang)) van hoi. hieu qua tham ((luc va) or (duc va)) hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky lang) OR (ky nang)) van hoi. hieu qua tham ((luc va) OR (duc va)) hanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky lang) OR (ky nang)) van hoi. hieu qua tham ((luc va) or (duc va)) hanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky lang) OR (ky nang)) van hoi. hieu qua tham ((luc va) or (duc va)) hanh tai cua triet*.