Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
cac phuc » cau phuc, khac phuc, cach thuc
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
phuc va » phuc vu, thuc va, chuc va
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ca tren » cau tren, cu tren, la tren
sac ky » cac ky, sai ky
va ca » va cac, va cao, va cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) or (sac ky)) nang xa hoi. hieu vien cac phuc va hanh va ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sac ky)) nang xa hoi. hieu vien cac phuc va hanh va ca tren.
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) or (sac ky)) nang xa hoi. hieu vien cac phuc va hanh va ca tren*.