Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
ban hanh » ban hang
duoc ban » duc ban, quoc ban, buoc ban
nam duoc » nam thuoc, da duoc, dat duoc
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
tang ha » lang ha, trung ha, tang van
sac ke » tac ke, sac ky, cac ke
di cua » dai cua, doi cua, de cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ke ((tang ha) OR (tang ma)) hoi. ((hieu van) or (lieu va)) nam duoc ban hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ke ((tang ha) OR (tang ma)) hoi. ((hieu van) OR (lieu va)) nam duoc ban hanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ke ((tang ha) OR (tang ma)) hoi. ((hieu van) or (lieu va)) nam duoc ban hanh di cua tre*".