Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
hien cac » thien cac, hieu cac, dien cac
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
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: su sach ky nang xa hoi. hieu ((hien cac) or (vien cac)) ly ((va hanh) OR (va thanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((hien cac) OR (vien cac)) ly ((va hanh) OR (va thanh)) vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((hien cac) or (vien cac)) ly ((va hanh) OR (va thanh)) vai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((hien cac) or (vien cac)) ly ((va hanh) OR (va thanh)) vai cua te*.