Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh ha
thanh van » thanh san, thanh toan, thanh phan
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky dang ma hoi. hieu va cam duc ban ((thanh dat) OR (thanh van)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky dang ma hoi. hieu va cam duc ban ((thanh dat) OR (thanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky dang ma hoi. hieu va cam duc ban ((thanh dat) OR (thanh van)) cua tre*.