Perhaps you should try some spelling variations:
nhanh thanh » phan thanh, nhanh tinh
thanh tung » thanh cong
thuc nhanh » thuc hanh, thuc nhan, thuc thanh
cuu thuc » cuu tac
tung cua » trung cua, tuong cua, dung cua
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach kem
van cuu » van cau, van chu, van cu
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: tu ((sach ky) or (sach ty)) ((nang x) or (nang ma)) hoi. hieu van cuu thuc nhanh thanh tung cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) ((nang x) OR (nang ma)) hoi. hieu van cuu thuc nhanh thanh tung cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) ((nang x) or (nang ma)) hoi. hieu van cuu thuc nhanh thanh tung cua te*.