Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh hai » thanh hai, nhanh hai, hang hai
sach ty » sach y, sach tu, sach thu
hai cua » thai cua, dai cua, hoi cua
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cao » va co, va dao, va bao

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 ty nang ma hoi. hieu ((va cac) or (va cao)) ((xuc va) OR (tuc va)) hanh hai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ma hoi. hieu ((va cac) OR (va cao)) ((xuc va) OR (tuc va)) hanh hai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang ma hoi. hieu ((va cac) or (va cao)) ((xuc va) OR (tuc va)) hanh hai cua vat".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ma hoi. hieu ((va cac) or (va cao)) ((xuc va) OR (tuc va)) hanh hai cua vat*.