Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
cau tren » cu tren, ca tren, cau treo
sach ty » sach y, sach tu, sach thu
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
su sach » so sach, vu sach
dau tuc » dau tu, dao tuc, cau truc
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
tuc va » thuc va, truc va, tuc xa
va dau » va dao

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 ty lang xa hoi. lieu va dau tuc va ((hanh di) or (hanh de)) ((cau tren) OR (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. lieu va dau tuc va ((hanh di) OR (hanh de)) ((cau tren) OR (dau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty lang xa hoi. lieu va dau tuc va ((hanh di) or (hanh de)) ((cau tren) OR (dau tren))*".