Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
phan duc » pham duc, phan tu, phan dau
hanh via » hanh vi, hanh va, anh va
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
cua tre » cuu tre, cua triet, dua tren
duc van » duc va, duc tan, duc manh
ve phan » va phan, ke phan, ve phat
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
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: ((te sach) or (thuoc sach)) ky nang ma hoi. hieu ve phan duc van hanh via ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ky nang ma hoi. hieu ve phan duc van hanh via ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuoc sach)) ky nang ma hoi. hieu ve phan duc van hanh via ((cua tre) OR (cua te))*".