Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » va thanh, va danh, ban hanh
luu tre » luu tru, cuu tre, luy tre
ve cac » va cac, vien cac
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. hieu ve cac xuc ((((va hanh) OR (van hanh))) or (gia thanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu ve cac xuc ((((va hanh) OR (van hanh))) OR (gia thanh)) vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu ve cac xuc ((((va hanh) OR (van hanh))) or (gia thanh)) vi luu tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu ve cac xuc ((((va hanh) OR (van hanh))) or (gia thanh)) vi luu tre*.