Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » thuat sach, thuoc sach, thu hoach
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
sang xa » song xa, lang xa, sang ma
ky sang » ky nang, ky dang, ky tang
van cam » van nam, van lam, van cau
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

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