Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
lan chau » lai chau, tran chau, luan chat
gian lan » gian lang, gian dan, giang van
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van hac » van hoc, van ha, van hai
tu sach » su sach, te sach, tu cach
xuc va » tuc va, luc va, xac 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 (thu sach)) ty nang xa hoi. hieu van hac ((xuc va) OR (duc va)) gian lan chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu van hac ((xuc va) OR (duc va)) gian lan chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty nang xa hoi. hieu van hac ((xuc va) OR (duc va)) gian lan chau triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty nang xa hoi. hieu van hac ((xuc va) OR (duc va)) gian lan chau triet*.