Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
cuu tre » cua tre, cau tren, cau treo
tinh ve » trinh ve, tinh ven, dinh ve
va tinh » may tinh
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
nam xuc » cam xuc, nam xua, nam thuc
xuc va » duc va, tuc va, luc va

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) OR (sach thu)) lang xa hoi. hieu van nam xuc va tinh ve ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) lang xa hoi. hieu van nam xuc va tinh ve ((cuu tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach thu)) lang xa hoi. hieu van nam xuc va tinh ve ((cuu tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach thu)) lang xa hoi. hieu van nam xuc va tinh ve ((cuu tre) or (su triet))*.