Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lop tuan » do tuan, le tuan, hop toan
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac lop » cac hop, cac loai
via cua » gia cua, gian cua, giau cua
ve cac » va cac, vien cac
va cua » va chua, ca cua, ma cua

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 lop tuan anh ((va cua) or (via cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ve cac lop tuan anh ((va cua) OR (via cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ve cac lop tuan anh ((va cua) or (via cua)) tre*.