Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
va trien » va truyen, va thiet, va tuyen
thuc gia » thuc giai, thue gia, thuc dia
ve chat » va chat, van chat
va cham » va chat, va tham
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ve cham » vu cham, ve chim, viet cham
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh

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 ky dang xa hoi. hieu ((((ve cham) OR (ve chat))) or (va cham)) thuc gia thanh dat va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ((((ve cham) OR (ve chat))) OR (va cham)) thuc gia thanh dat va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ((((ve cham) OR (ve chat))) or (va cham)) thuc gia thanh dat va trien".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ((((ve cham) OR (ve chat))) or (va cham)) thuc gia thanh dat va trien*.