Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
lam duc » lam duoc, pham duc, nam duoc
dang xa » dang xay, lang xa, dang va
cua tre » cuu tre, cua triet, dua tren
dang ha » dong ha, dung ha, lang ha
su sac » su sach, su cac, su xac
va lam » van lam, va lap
sac ky » cac ky, sai ky
cua te » cua tu

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 xa) or (dang ha)) hoi. hieu va lam duc va thanh toan ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((dang xa) OR (dang ha)) hoi. hieu va lam duc va thanh toan ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((dang xa) or (dang ha)) hoi. hieu va lam duc va thanh toan ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((dang xa) or (dang ha)) hoi. hieu va lam duc va thanh toan ((cua tre) OR (cua te))*.