Perhaps you should try some spelling variations:
danh viet » anh viet, ninh viet, nang viet
lam thuoc » nam thuoc, am thuc, cay thuoc
doc sach » hoc sach, toc sach, nuoc sach
lam duoc » nam duoc, luat duoc, tao duoc
viet cua » viec cua, viet ca, viet qua
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, lang van
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: doc sach ky ((lang xa) OR (dang xay)) hoi. hieu van ((lam duoc) or (lam thuoc)) va danh viet cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky ((lang xa) OR (dang xay)) hoi. hieu van ((lam duoc) OR (lam thuoc)) va danh viet cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ky ((lang xa) OR (dang xay)) hoi. hieu van ((lam duoc) or (lam thuoc)) va danh viet cua te".
• Adding a wildcard symbol may retrieve word variants: doc sach ky ((lang xa) OR (dang xay)) hoi. hieu van ((lam duoc) or (lam thuoc)) va danh viet cua te*.