Perhaps you should try some spelling variations:
thieu bang » thien bang, thieu khang, thieu quang
nam thuc » nam thuoc, am thuc, nam thu
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
su sach » so sach, vu sach
nam xuc » cam xuc, nam xua, nam duoc
bang xa » lang xa, bang va, mang xa
cuu tre » cua tre, cau tren, cau treo

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