Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
day hanh » day nhanh, day thanh, day manh
dao hanh » dao thanh, dang hanh, ban hanh
cong cua » cong cu, dong cua, huong cua
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty lang xa hoi. hieu van nam thuoc ((day hanh) or (dao hanh)) cong cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty lang xa hoi. hieu van nam thuoc ((day hanh) OR (dao hanh)) cong cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty lang xa hoi. hieu van nam thuoc ((day hanh) or (dao hanh)) cong cua tre*.