Perhaps you should try some spelling variations:
ban hanh » ban hang
sach ky » sach ty, sach kem, sach hay
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc ban » thuc ban, truc ban, tu ban
hanh va » hang va, hanh vi
su tien » su kien, su hien, tu tieng
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam

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 ky) or (sac ky))) or (sach y)) nang xa hoi. hieu ve cam tuc ban hanh va su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach ky) OR (sac ky))) OR (sach y)) nang xa hoi. hieu ve cam tuc ban hanh va su tien.
• Adding a wildcard symbol may retrieve word variants: su ((((sach ky) or (sac ky))) or (sach y)) nang xa hoi. hieu ve cam tuc ban hanh va su tien*.