Perhaps you should try some spelling variations:
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cuu » trinh cuu, dinh cuu, tinh cua
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
ve bao » te bao, va bao
de co » ke co

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky dang xay hoi. hieu ((((de co) or (vo co))) or (ve bao)) duc va hanh tinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xay hoi. hieu ((((de co) OR (vo co))) OR (ve bao)) duc va hanh tinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. hieu ((((de co) or (vo co))) or (ve bao)) duc va hanh tinh cuu tre*.