Perhaps you should try some spelling variations:
ban hanh » ban hang
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
tu nang » tru nang, tu nano, tu lang
tu nong » tu dong, tu cong, tu tong
hieu va » lieu va, hieu qua
nam xua » nam cua, nam mua, nam qua
xua ban » xuat ban, cua ban, qua ban
va nam » van nam, ha nam, va nay
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tu nang) or (tu nong)) xa hoi. hieu va nam xua ban hanh di ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nong)) xa hoi. hieu va nam xua ban hanh di ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) or (tu nong)) xa hoi. hieu va nam xua ban hanh di ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tu nong)) xa hoi. hieu va nam xua ban hanh di ((cua te) OR (cua tu))*.