Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
tu sach » su sach, te sach, tu cach
xuc van » duc van, luc van, xuc ban
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
van anh » van thanh, tuan anh, van minh
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu van cau xuc van anh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu van cau xuc van anh ((vai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang xa hoi. hieu van cau xuc van anh ((vai cua) or (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu van cau xuc van anh ((vai cua) or (hai cua)) tre*.