Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham xuc » cam xuc, chat xuc, cham soc
hang tai » hang va, dung tai
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
han tai » nhan tai, toan tai, nhan tao
van tai » von tai, van tuan
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc 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: thu sach ky nang ma hoi. hieu van cham xuc va ((((han tai) OR (hang tai))) or (van tai)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoi. hieu van cham xuc va ((((han tai) OR (hang tai))) OR (van tai)) va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ma hoi. hieu van cham xuc va ((((han tai) OR (hang tai))) or (van tai)) va thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoi. hieu van cham xuc va ((((han tai) OR (hang tai))) or (van tai)) va thiet*.