Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
ve pham » vi pham, v pham, ve phan
va hanh » van hanh, va thanh, va danh
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
d pham » d phan

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) or (te sach)) ky dang xa hoi. hieu ((ve pham) or (d pham)) duc va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky dang xa hoi. hieu ((ve pham) OR (d pham)) duc va hanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ky dang xa hoi. hieu ((ve pham) or (d pham)) duc va hanh tai cuu tre*.