Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu lang » cu lang, tu lanh, xu lang
lang xa » lang ha, dang xay, lang van
dau tuc » dau tu, dao tuc, cau truc
hanh di » hanh vi, hanh de, hang di
hanh ve » hanh vi, hanh va, hanh kem
cuu tre » cua tre, cau tren, cau treo
va dau » va dao
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tu lang xa hoi. lieu va dau tuc va ((hanh di) or (hanh ve)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu lang xa hoi. lieu va dau tuc va ((hanh di) OR (hanh ve)) cuu tre*.