Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van thanh » ban thanh, van tuan
nang xa » nang x, lang xa, nang ma
van cam » van lam, van cau, van dam
vuc van » duc van, luc van, thuc van
vai cua » hai cua, lai cua, bai cua
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu ((van cam) OR (van nam)) vuc van thanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang xa hoi. hieu ((van cam) OR (van nam)) vuc van thanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang xa hoi. hieu ((van cam) OR (van nam)) vuc van thanh ((vai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. hieu ((van cam) OR (van nam)) vuc van thanh ((vai cua) or (dai cua)) tre*.