Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
hieu van » hieu va, thien van, lieu va
toan cua » than cua, tan cua, doanh cua
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
cac dac » cac dan, cac dai, cac bac
cac duc » cac du, cao duc, cac nuoc
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang ma hoi. ((hieu ve) OR (hieu van)) ((cac duc) or (cac dac)) va thanh toan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ma hoi. ((hieu ve) OR (hieu van)) ((cac duc) OR (cac dac)) va thanh toan cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ma hoi. ((hieu ve) OR (hieu van)) ((cac duc) or (cac dac)) va thanh toan cua tre*".