Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va nhanh » va thanh, va hanh, va nhan
hai cua » thai cua, dai cua, hoi cua
cau luc » cau truc, cau phuc
cau duc » cao duc, chu duc, cau truc
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
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 ky ((lang xa) or (nang ma)) hoi. hieu van ((cau duc) OR (cau luc)) va nhanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((lang xa) OR (nang ma)) hoi. hieu van ((cau duc) OR (cau luc)) va nhanh hai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((lang xa) or (nang ma)) hoi. hieu van ((cau duc) OR (cau luc)) va nhanh hai cua te*".