Perhaps you should try some spelling variations:
vien chao » vien cao, vien cheo, vien cho
hieu vien » hieu hien, hieu viec, thieu nien
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
xu van » tu van, vu van, su van
vi cua » vai cua, di cua
cua te » cua tu
xu va » tu va, su va, vu va

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 (sach y)) nang xa hoi. hieu vien chao ((xu va) OR (xu van)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang xa hoi. hieu vien chao ((xu va) OR (xu van)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang xa hoi. hieu vien chao ((xu va) OR (xu van)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang xa hoi. hieu vien chao ((xu va) OR (xu van)) hanh vi cua te*.