Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat qua » chat cua, nhat qua, chat lua
nang ma » tang ma, sang ma, nang cao
qua ban » cua ban, qua quan
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ma hoi. hieu van chat qua ban ((thanh vai) or (thanh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. hieu van chat qua ban ((thanh vai) OR (thanh toan)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. hieu van chat qua ban ((thanh vai) or (thanh toan)) cua tre*.