Perhaps you should try some spelling variations:
sach truc » cach thuc, sach tren, sach thu
tu sach » thu sach, su sach, te sach
nano xa » nano va, nano bac, nano cau
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ve cai » va cai, ve tai, ve cau
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
cua te » cua tu

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 truc nano xa hoi. hieu ((ve cai) or (ve cac)) tuc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach truc nano xa hoi. hieu ((ve cai) OR (ve cac)) tuc va danh vi cua te*.