Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
benh di » benh dai, ben di, benh da
cuu ban » cuu van, cua ban, cuu san
cuc ban » cua ban, cac ban, duc ban
van lam » van nam
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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) OR (sach ty)) nang xa hoi. hieu van lam ((cuc ban) or (cuu ban)) benh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach ty)) nang xa hoi. hieu van lam ((cuc ban) OR (cuu ban)) benh di cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sach ty)) nang xa hoi. hieu van lam ((cuc ban) or (cuu ban)) benh di cuu tre*".