Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
kem cua » keo cua, diem cua
va cam » va cham, va cac, va cao
em cua » diem cua
x hoi » xa hoi, o hoi, x ho

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) or (cac ky)) nang x hoi. hieu va cam tuc van hanh ((kem cua) or (em cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (cac ky)) nang x hoi. hieu va cam tuc van hanh ((kem cua) OR (em cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (cac ky)) nang x hoi. hieu va cam tuc van hanh ((kem cua) or (em cua)) tre*.