Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
co tuan » co quan, do tuan, cong tuan
via cua » gian cua, giau cua, rija cua
gia cua » gian cua, giau cua, gia cuc
ve cac » va cac, vien cac
cac co » cac cong

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 co tuan 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 co tuan anh ((via cua) OR (gia cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ve cac co tuan anh ((via cua) or (gia cua)) tre*.