Perhaps you should try some spelling variations:
sang tao » hang tai
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach kem
hieu ve » hieu van
tao hoi » tao khoi, tao boi, tay hoi
sach ty » sach y, sach tu, sach thu
toc va » hoc va, toc ta, tuc va
va dan » ca dan, va dao, va dau
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: tu ((sach ky) OR (sach ty)) sang tao hoi. ((hieu ve) or (hieu va)) cac toc va dan vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) sang tao hoi. ((hieu ve) OR (hieu va)) cac toc va dan vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) sang tao hoi. ((hieu ve) or (hieu va)) cac toc va dan vai cua te*".