Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
toc sach » hoc sach, doc sach, thuoc sach
tuc thai » thuc thai, toc thai, tuc hai
toan cua » than cua, tan cua, doanh cua
hieu van » thien van, lieu va, hieu ve
thuc tap » tuc tap, thuc thai, thuc vat
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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: toc sach ky lang xa hoi. ((hieu van) OR (hieu va)) nam ((tuc thai) or (thuc tap)) thanh toan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky lang xa hoi. ((hieu van) OR (hieu va)) nam ((tuc thai) OR (thuc tap)) thanh toan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky lang xa hoi. ((hieu van) OR (hieu va)) nam ((tuc thai) or (thuc tap)) thanh toan cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. ((hieu van) OR (hieu va)) nam ((tuc thai) or (thuc tap)) thanh toan cua te*.