Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
dinh ve » dinh ket, dinh van
va dinh » van dinh, va kinh, va tinh
va chat » van chat, cao chat, hoa chat
ly hang » ly quang
ty nang » ky nang, ty xang, ty hang
luu tre » luu tru, cuu tre, luy tre
luc va » duc va, tuc va, loc va
ve luu » ke luu, vi luu

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) or (ly hang)) xa hoi. hieu ((va chat) OR (va phat)) luc va dinh ve luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ly hang)) xa hoi. hieu ((va chat) OR (va phat)) luc va dinh ve luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ly hang)) xa hoi. hieu ((va chat) OR (va phat)) luc va dinh ve luu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ly hang)) xa hoi. hieu ((va chat) OR (va phat)) luc va dinh ve luu tre*.