Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, te sach, tu cach
hanh di » hanh vi, hanh de, hang di
xua ban » xuat ban, cua ban, qua ban
nam xua » nam cua, nam mua, nam qua
tu nong » tu dong, tu cong, tu tong
tu nang » tru nang, tu nano, tu lang
su sach » so sach, vu sach
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

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