Perhaps you should try some spelling variations:
vien can » vien canh, vien cac, vien cao
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
vien da » vien dai, hien dai
xuc van » duc van, luc van, vuc van
hanh di » hanh vi, hanh de, hang di
cua tuc » cua duc, cua tu, cua thuoc
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, de cua

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 v nang xa hoi. hieu ((vien can) or (vien da)) xuc van hanh di cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang xa hoi. hieu ((vien can) OR (vien da)) xuc van hanh di cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu sach v nang xa hoi. hieu ((vien can) or (vien da)) xuc van hanh di cua tuc*.