Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lang dao » lanh dao, lang cao, lang dai
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
ke nhan » de nhan, ke phan, ke nan
va lang » va nang, hoa lang
dao cua » dai cua, day cua, dan cua
y tang » ky tang, 6 tang, 7 tang
luc va » duc 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 sach y tang xa hoi. hieu ((ke nhan) or (ke nha)) luc va lang dao cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang xa hoi. hieu ((ke nhan) OR (ke nha)) luc va lang dao cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach y tang xa hoi. hieu ((ke nhan) or (ke nha)) luc va lang dao cua triet*.