Perhaps you should try some spelling variations:
bien dai » hien dai, vien dai, bien doi
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
xa hanh » xa thanh, xa khanh, va hanh
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) OR (su sach)) ky tang xa hoi. hieu ((va cac) or (bien dai)) tuc xa hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky tang xa hoi. hieu ((va cac) OR (bien dai)) tuc xa hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky tang xa hoi. hieu ((va cac) or (bien dai)) tuc xa hanh vi cua te*".