Perhaps you should try some spelling variations:
su cach » su sach, tu cach, su cac
cach tu » cach thuc
va hanh » van hanh, va thanh, va danh
va dinh » van dinh, va kinh, va tinh
cao suc » cao su, cao duc
tu nang » tru nang, tu nong, tu nano
hieu va » hieu qua
va cua » va chua, via cua, ca cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach tu nang x hoi. ((hieu va) OR (lieu va)) cao suc ((va dinh) or (va hanh)) va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach tu nang x hoi. ((hieu va) OR (lieu va)) cao suc ((va dinh) OR (va hanh)) va cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cach tu nang x hoi. ((hieu va) OR (lieu va)) cao suc ((va dinh) or (va hanh)) va cua te*".