Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thai cua » tai cuc, tri cua, dai cua
than cua » nhan cua, ban cua, gian cua
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, dan cac
van bac » van ban, van bao, van hac
va dang » van dang, va nang, va lang

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 ky nang xa hoi. hieu ((van cac) OR (van bac)) nuoc va dang ((thai cua) or (than cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. hieu ((van cac) OR (van bac)) nuoc va dang ((thai cua) OR (than cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xa hoi. hieu ((van cac) OR (van bac)) nuoc va dang ((thai cua) or (than cua)) te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. hieu ((van cac) OR (van bac)) nuoc va dang ((thai cua) or (than cua)) te*.