Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
hanh via » hanh vi, hanh va, anh va
van cam » van nam, van lam, van cau
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
xuc xa » tuc xa, buc xa

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