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

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) OR (cac ky)) dang ma hoi. hieu va cam duc ban ((thanh dat) or (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac 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) OR (cac 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) OR (cac ky)) dang ma hoi. hieu va cam duc ban ((thanh dat) or (thanh van)) cua tre*.