Perhaps you should try some spelling variations:
tai khoi » tai khoa, mai khoi, tao khoi
nang tai » hang tai, tang tai, sang tai
su sach » so sach
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
hieu va » hieu qua
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua

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) or (vu sach)) ky nang tai khoi. ((hieu va) or (lieu va)) cam xuc va danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang tai khoi. ((hieu va) OR (lieu va)) cam xuc va danh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang tai khoi. ((hieu va) or (lieu va)) cam xuc va danh va cua tre*.