Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thu sach » tu sach, thuat sach, thuoc sach
toan cua » than cua, tan cua, doanh cua
cao duc » dao duc, cao suc, giao duc
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam duc » cam xuc, pham duc, nam duoc
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: thu sach y ((tang ma) or (lang xa)) hoi. hieu va ((cam duc) OR (cao duc)) gia thanh toan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((tang ma) OR (lang xa)) hoi. hieu va ((cam duc) OR (cao duc)) gia thanh toan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((tang ma) or (lang xa)) hoi. hieu va ((cam duc) OR (cao duc)) gia thanh toan cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((tang ma) or (lang xa)) hoi. hieu va ((cam duc) OR (cao duc)) gia thanh toan cua te*.