Perhaps you should try some spelling variations:
dang xay » dang van, van xay
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
va cua » va chua, via cua, ca cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky dang xay hoi. hieu ve ((chon loc) OR (cho hoc)) va thanh va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky dang xay hoi. hieu ve ((chon loc) OR (cho hoc)) va thanh va cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang xay hoi. hieu ve ((chon loc) OR (cho hoc)) va thanh va cua te*.