Perhaps you should try some spelling variations:
thue trong » thuc trong, thuat trong, thuoc trong
sach thue » sach thu, sach thieu, sach tham
ve triet » va trien, su triet
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thue trong ((ma hoi) OR (mai hoi)). hieu ve cam tuc va hanh vi ((cuu tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thue trong ((ma hoi) OR (mai hoi)). hieu ve cam tuc va hanh vi ((cuu tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thue trong ((ma hoi) OR (mai hoi)). hieu ve cam tuc va hanh vi ((cuu tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: so sach thue trong ((ma hoi) OR (mai hoi)). hieu ve cam tuc va hanh vi ((cuu tre) or (ve triet))*.