Perhaps you should try some spelling variations:
ban hanh » ban hang
sinh cua » manh cua, dinh cuu, sinh va
dang xay » dang van, van xay
vinh cuu » dinh cuu, dinh cu, tinh cua
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
va cam » va cham, va cac, va cao

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 va cam tuc ((ban hanh) or (van hanh)) ((vinh cuu) or (sinh cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xay hoi. hieu va cam tuc ((ban hanh) OR (van hanh)) ((vinh cuu) OR (sinh cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. hieu va cam tuc ((ban hanh) or (van hanh)) ((vinh cuu) or (sinh cua)) tre*.