Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
toan cua » than cua, tan cua, doanh cua
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cao duc » dao duc, giao duc, tao duoc
cao suc » cao su
ty nang » ky nang, ty xang, ty hang
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) ty nang x hoi. hieu van ((cao duc) OR (cao suc)) gia thanh toan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ty nang x hoi. hieu van ((cao duc) OR (cao suc)) gia thanh toan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) ty nang x hoi. hieu van ((cao duc) OR (cao suc)) gia thanh toan cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ty nang x hoi. hieu van ((cao duc) OR (cao suc)) gia thanh toan cua te*.