Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
vinh cuu » dinh cuu, dinh cu, tinh cua
sinh cua » manh cua, dinh cuu, sinh va
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc gia » quoc gia
y dang » ky dang, 2 dang, _ dang
vi cuu » vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y dang xay hoi. hieu ve pham duc gia thanh ((vi cuu) or (((vinh cuu) OR (sinh cua)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y dang xay hoi. hieu ve pham duc gia thanh ((vi cuu) OR (((vinh cuu) OR (sinh cua)))) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y dang xay hoi. hieu ve pham duc gia thanh ((vi cuu) or (((vinh cuu) OR (sinh cua)))) tre*".