Perhaps you should try some spelling variations:
lang chai » lang ha, lang cua, lang phi
va triet » va thiet, va trien, ve triet
tru nang » tra nang, tri nang, truc nano
van hoc » van hoa
chai va » chat va, thai va, hai va
va lang » va nang, hoa lang
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
te sach » toc sach
van hac » van ha, van hai, van chat
xuc va » duc va, tuc va, luc 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 (te sach)) tru nang xa hoi. hieu ((van hac) or (van hoc)) xuc va lang chai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) tru nang xa hoi. hieu ((van hac) OR (van hoc)) xuc va lang chai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) tru nang xa hoi. hieu ((van hac) or (van hoc)) xuc va lang chai va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) tru nang xa hoi. hieu ((van hac) or (van hoc)) xuc va lang chai va triet*.