Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
giau cua » gia cua, dieu cua, bieu cua
gian cua » gian xu, ban cua
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
van anh » van thanh, van minh
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
cac bo » bac bo, cac co
tuan » quan, tran, luan

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

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