Perhaps you should try some spelling variations:
duc tien » duc thien, luc tieng, thuc tien
hang tai » hang va, dung tai
hieu van » hieu va, thien van, lieu va
tai duc » tai cuc, mai duc, tai du
va hang » van hang, va nang, va lang
vu sach » vu bach, vu khach
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
su sach » so sach
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (su sach)) ky nang ma hoi. ((hieu ve) or (hieu van)) cam xuc va hang tai duc tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang ma hoi. ((hieu ve) OR (hieu van)) cam xuc va hang tai duc tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) ky nang ma hoi. ((hieu ve) or (hieu van)) cam xuc va hang tai duc tien".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) ky nang ma hoi. ((hieu ve) or (hieu van)) cam xuc va hang tai duc tien*.