Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
sach kem » hanh kem
su tien » su kien, tu tieng, dau tien
tuc ban » thuc ban, truc ban, tu ban
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
su hien » su kien, thu hien, nhu hien
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: su ((sach kem) or (sach y)) nang xa hoi. hieu va cam tuc ban thanh van ((su tien) OR (su hien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kem) OR (sach y)) nang xa hoi. hieu va cam tuc ban thanh van ((su tien) OR (su hien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach kem) or (sach y)) nang xa hoi. hieu va cam tuc ban thanh van ((su tien) OR (su hien))".
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sach y)) nang xa hoi. hieu va cam tuc ban thanh van ((su tien) OR (su hien))*.