Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
luc van » luoc van, luu van, duc van
hanh di » hanh vi, hanh de, hang di
ve cac » va cac
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. hieu ((ve cac) OR (vien cac)) luc van hanh di cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ((ve cac) OR (vien cac)) luc van hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ((ve cac) OR (vien cac)) luc van hanh di cua te*.