Perhaps you should try some spelling variations:
sang tay » sang tao, sang tai, sang tac
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va chua » vua chua, ca chua, va chu
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
tay hoi » tay ho, tao hoi, tay thai
ky sang » ky nang, ky dang, ky tang
tuc va » thuc va, truc va, tuc xa
va dau » va dao
va cua » via cua, ca cua, ma cua

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 sang tay hoi. ((hieu ve) or (lieu va)) cac tuc va dau ((va cua) OR (va chua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang tay hoi. ((hieu ve) OR (lieu va)) cac tuc va dau ((va cua) OR (va chua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang tay hoi. ((hieu ve) or (lieu va)) cac tuc va dau ((va cua) OR (va chua)) te*".