Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
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 bac » van bao, van hac, dan bac
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang xa hoi. thi ((van bac) OR (van ban)) nuoc va lang ((thai cua) or (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. thi ((van bac) OR (van ban)) nuoc va lang ((thai cua) OR (than cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang xa hoi. thi ((van bac) OR (van ban)) nuoc va lang ((thai cua) or (than cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. thi ((van bac) OR (van ban)) nuoc va lang ((thai cua) or (than cua)) tre*.