Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tham nang » nham nang, tham lang, tham nhung
toc sach » hoc sach, doc sach, nuoc sach
va trong » va truong, va thong, va tuong
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cach » va cac
cach tu » cach thuc
doi cau » doi dau, di cau, doi ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (thuoc sach)) tham nang xa hoi. hieu va cach tu va trong doi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) tham nang xa hoi. hieu va cach tu va trong doi cau tren".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) tham nang xa hoi. hieu va cach tu va trong doi cau tren*.