Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh hai » thanh phan, thanh hoa, thanh san
thanh lap » thanh san, phan lap, thanh van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
van cau » van dau, van hau, van chat
van cac » van hac, van bac, dan cac
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
dac va » duc va, day va, dat 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 ty nang xa hoi. hieu ((van cac) OR (van cau)) dac va ((thanh lap) or (thanh hai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((van cac) OR (van cau)) dac va ((thanh lap) OR (thanh hai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((van cac) OR (van cau)) dac va ((thanh lap) or (thanh hai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((van cac) OR (van cau)) dac va ((thanh lap) or (thanh hai)) cua triet*.