Perhaps you should try some spelling variations:
hanh vinh » thanh vinh, khanh vinh, hanh tinh
duc manh » suc manh, duc anh, duc minh
vinh cuu » dinh cuu, sinh cua, dinh cu
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
xuc ban » duc ban, cuc ban, quoc ban
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cuu tre » cua tre, cau tren, cau treo

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 ((nang xa) or (lang xa)) hoi. hieu van nam ((duc manh) or (xuc ban)) hanh vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (lang xa)) hoi. hieu van nam ((duc manh) OR (xuc ban)) hanh vinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (lang xa)) hoi. hieu van nam ((duc manh) or (xuc ban)) hanh vinh cuu tre*.