Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham xuc » cam xuc, chat xuc, cham soc
van phan » van phong, van thanh, luan phan
sach ky » sach y, sach ty, sach kem
van han » van hanh, van nhan, van hoan
thai va » thai van
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho
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 ky) or (sac ky)) nang x hoi. hieu qua cham xuc ((van han) OR (van phan)) thai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) nang x hoi. hieu qua cham xuc ((van han) OR (van phan)) thai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) nang x hoi. hieu qua cham xuc ((van han) OR (van phan)) thai va thiet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) nang x hoi. hieu qua cham xuc ((van han) OR (van phan)) thai va thiet*.