Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
gian lang » gian dan
thu sach » thuat sach, thuoc sach, thu hoach
gian lan » gian dan, giang van, gian cac
hieu van » hieu va, thien van, lieu va
hac xuc » chat xuc
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
van hac » van hoc, van ha, van hai
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 (thu sach)) ty nang xa hoi. hieu van hac xuc va ((gian lan) OR (gian lang)) cau 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 ((gian lan) OR (gian lang)) cau 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 ((gian lan) OR (gian lang)) cau triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty nang xa hoi. hieu van hac xuc va ((gian lan) OR (gian lang)) cau triet*.