Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
xay hoi » xa hoi, tay hoi, cay phoi
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
xa hanh » xa thanh, xa khanh, va hanh
hoi cua » hoi chuc
y dang » ky dang, 2 dang, _ dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y dang xay hoi. hieu van cam tuc xa hanh ((((doi cua) OR (hoi cua))) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y dang xay hoi. hieu van cam tuc xa hanh ((((doi cua) OR (hoi cua))) OR (dai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y dang xay hoi. hieu van cam tuc xa hanh ((((doi cua) OR (hoi cua))) or (dai cua)) tre*".