Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dang thai » dang thi, dang hai, dang khai
thi hanh » thi thanh
thai cua » than cua, tai cuc, tri cua
bac nuoc » cac nuoc, bach tuoc, sach nuoc
va dang » van dang, va nang, va lang
thi lan » thi nang, thi lien
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((nang xa) OR (nang ma)) hoi. ((thi hanh) or (thi lan)) bac nuoc va dang thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang xa) OR (nang ma)) hoi. ((thi hanh) OR (thi lan)) bac nuoc va dang thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang xa) OR (nang ma)) hoi. ((thi hanh) or (thi lan)) bac nuoc va dang thai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang xa) OR (nang ma)) hoi. ((thi hanh) or (thi lan)) bac nuoc va dang thai cua tre*.