Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
vien cac » vien bach, vien dai, vien da
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
van anh » van thanh, tuan anh, van minh
via cua » gian cua, giau cua, rija cua
gia cua » gian cua, giau cua, gia cuc
ve cac » va cac
lo van » le van, vo van, so van

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

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