Perhaps you should try some spelling variations:
thai cua » tai cuc, tri cua, dai cua
than cua » nhan cua, ban cua, gian cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
nang o » nang co, nang ho, nang ro
ve cac » va cac, vien cac
o hoc » co hoc, mo hoc, so hoc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang o hoc. hieu ve cac ((xuc van) or (duc van)) nhanh ((thai cua) OR (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hoc. hieu ve cac ((xuc van) OR (duc van)) nhanh ((thai cua) OR (than cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang o hoc. hieu ve cac ((xuc van) or (duc van)) nhanh ((thai cua) OR (than cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hoc. hieu ve cac ((xuc van) or (duc van)) nhanh ((thai cua) OR (than cua)) tre*.