Perhaps you should try some spelling variations:
te sach » toc sach
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu cua

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 ty ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu va)) cac luc va danh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (lang xa)) hoi. ((hieu ve) OR (hieu va)) cac luc va danh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu va)) cac luc va danh de cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu va)) cac luc va danh de cua tre*.