Perhaps you should try some spelling variations:
sinh cua » manh cua, sinh va
thu sach » thuat sach, thuoc sach, thu hoach
dinh cuu » dinh chi
tu sach » su sach, te sach, tu cach
cao duc » dao duc, cao suc, giao duc
va dinh » van dinh, va kinh, va tinh
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cao » va cao, ve bao, ve cac
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ve cao duc va dinh ((dinh cuu) or (sinh cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ve cao duc va dinh ((dinh cuu) OR (sinh cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang x hoi. hieu ve cao duc va dinh ((dinh cuu) or (sinh cua)) tre*".