Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
luan nang » luan van, van nang, luan san
sach luan » sach luyen, sach han, san luan
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
va dau » va dao
va cau » van cau, va cac, va cao
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: thuat sach luan nang x hoi. hieu ((va cau) or (va dau)) duc va hanh ((vai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach luan nang x hoi. hieu ((va cau) OR (va dau)) duc va hanh ((vai cua) OR (hai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach luan nang x hoi. hieu ((va cau) or (va dau)) duc va hanh ((vai cua) OR (hai cua)) tre*".