Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu su » hieu sau, tieu su, hieu so
su cham » su pham, tu cham, vu cham
xuc van » duc van, luc van, vuc van
vi va » vi van, vai va, vu 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: tu sach tu ((nang ma) OR (tang ma)) hoi. hieu su cham xuc van hanh vi va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu ((nang ma) OR (tang ma)) hoi. hieu su cham xuc van hanh vi va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((nang ma) OR (tang ma)) hoi. hieu su cham xuc van hanh vi va thiet*.