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