Perhaps you should try some spelling variations:
than cua » nhan cua, ban cua, gian cua
toc sach » hoc sach, doc sach, thuoc sach
thai cua » tai cuc, tri cua, dai cua
cham duc » pham duc, cham soc, pham duy
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
va anh » van anh, va danh, va hanh
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (toc sach)) ky tang xa hoi. hieu va cham duc va anh ((thai cua) OR (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (toc sach)) ky tang xa hoi. hieu va cham duc va anh ((thai cua) OR (than cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (toc sach)) ky tang xa hoi. hieu va cham duc va anh ((thai cua) OR (than cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (toc sach)) ky tang xa hoi. hieu va cham duc va anh ((thai cua) OR (than cua)) tre*.