Perhaps you should try some spelling variations:
nganh cong » nhanh chong
nghe trung » nghe trong, nghiem trung, nghe thong
trung tinh » truong tinh, trong tinh, trung binh
va truyen » hoa truyen, co truyen, di truyen
tu sach » thu sach, su sach, te sach
tinh va » tich va, trinh van, trinh vat
thong » trong

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 ((nganh cong) or (thanh cong)) nghe trung tinh va truyen thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((nganh cong) OR (thanh cong)) nghe trung tinh va truyen thong.
• Adding a wildcard symbol may retrieve word variants: tu sach ((nganh cong) or (thanh cong)) nghe trung tinh va truyen thong*.