Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh hoa » thanh pho
cau tren » cu tren, dau tren, ca tren
va thanh » gia thanh, ban thanh, va tinh
kho tang » cao tang
hoa cau » hoa cac, hoa dau, hoa mau
hieu ve » hieu va, hieu van
tu cach » tu cac
ve cac » va cac, vien cac
du va » dau va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuoc sach)) ((ky nang) or (kho tang)) xa hoi. hieu ve cac du va thanh hoa cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ((ky nang) OR (kho tang)) xa hoi. hieu ve cac du va thanh hoa cau tren.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuoc sach)) ((ky nang) or (kho tang)) xa hoi. hieu ve cac du va thanh hoa cau tren*.