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