Perhaps you should try some spelling variations:
te sach » toc sach
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
nang xa » nang x, lang xa, nang ma
do van » dao van, vo van, so van
cac do » cac don, cac doi, cac du

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