Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
ban banh » ban hanh, ban anh, ban danh
ba benh » va benh, bo benh, bach benh
van cam » van nam, van lam, van cau
nang xa » lang xa, nang ma, mang xa
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc ((ban banh) or (ba benh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc ((ban banh) OR (ba benh)) di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc ((ban banh) or (ba benh)) di cua tre*".