Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh hai » thanh hai, nhanh hai, hang hai
quoc ban » quoc bao, quoc lan, quoc quan
va tham » van tham, va cham, va thanh
hai cua » thai cua, dai cua, hoi cua
xuc ban » duc ban, cuc ban, xuat ban
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
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: thu sach ty ((nang xa) or (nang ma)) hoi. hieu va tham ((xuc ban) OR (quoc ban)) hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang xa) OR (nang ma)) hoi. hieu va tham ((xuc ban) OR (quoc ban)) hanh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((nang xa) or (nang ma)) hoi. hieu va tham ((xuc ban) OR (quoc ban)) hanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang xa) or (nang ma)) hoi. hieu va tham ((xuc ban) OR (quoc ban)) hanh hai cua te*.