Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
manh tay » canh tay, manh xay, manh toan
mang tay » mang may, bang tay, quang tay
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
hieu ve » hieu van
sach le » cach le, sach de, sach lo
vai va » mai va, dai va, hai va
thiet* » thieu*

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 le ((manh tay) OR (mang tay)) hoi. ((hieu ve) or (hieu va)) cao duc va hanh vai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach le ((manh tay) OR (mang tay)) hoi. ((hieu ve) OR (hieu va)) cao duc va hanh vai va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach le ((manh tay) OR (mang tay)) hoi. ((hieu ve) or (hieu va)) cao duc va hanh vai va thiet*".