Perhaps you should try some spelling variations:
sach dao » lanh dao
hang tai » dung tai
cham xuc » cam xuc, chat xuc, cham soc
sach hoi » sach doi, sach moi, cach thoi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
xuc va » duc va, tuc va, luc va
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 hoi) or (sach dao)) ((hang tai) or (hang va)) hoi. hieu ve cham xuc va hanh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoi) OR (sach dao)) ((hang tai) OR (hang va)) hoi. hieu ve cham xuc va hanh vi va thiet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) or (sach dao)) ((hang tai) or (hang va)) hoi. hieu ve cham xuc va hanh vi va thiet*.