Perhaps you should try some spelling variations:
cua chua » sua chua, cua chu, cua nhua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua cua » ca cua, qua cua, cua cha
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa

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

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