Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
su sach » so sach, vu sach
dan hai » doan hai, dang hai, dan khai
ky hang » ky nang, ly hang, ky dang
tai hoi » tai khoi, dai hoi, tai hai
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
xa dan » ca dan, xa dai, va dan
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky hang tai hoi. ((hieu ve) or (hieu va)) cac tuc xa dan hai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky hang tai hoi. ((hieu ve) OR (hieu va)) cac tuc xa dan hai ((cua te) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky hang tai hoi. ((hieu ve) or (hieu va)) cac tuc xa dan hai ((cua te) OR (cua tu))*".