Perhaps you should try some spelling variations:
dat khanh » van khanh, duy khanh
toc sach » hoc sach, doc sach, thuoc sach
cam tuc » cam xuc, cam tu, nam thuc
tuc dat » tu dat, tuc dan, tuc hat
lai cua » dai cua, lai chau, thai cua
hai cua » thai cua, dai cua, hoi cua
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ky nang x ho. lieu va cam tuc dat khanh ((lai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang x ho. lieu va cam tuc dat khanh ((lai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky nang x ho. lieu va cam tuc dat khanh ((lai cua) or (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky nang x ho. lieu va cam tuc dat khanh ((lai cua) or (hai cua)) tre*.