Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
nganh cong » nhanh chong, thanh cong
thang tien » toan tien, thanh vien, bang tien
va truyen » hoa truyen, co truyen, tu truyen
di truyen » co truyen
thu sach » tu sach, thuat sach, thuoc sach
cong he » cong che, cong ha, cong de

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 nganh cong he ((thang tien) or (thong tin)) ((va truyen) or (di truyen)) thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach nganh cong he ((thang tien) OR (thong tin)) ((va truyen) OR (di truyen)) thong.
• Adding a wildcard symbol may retrieve word variants: thu sach nganh cong he ((thang tien) or (thong tin)) ((va truyen) or (di truyen)) thong*.