Perhaps you should try some spelling variations:
doanh cua » doanh luan
nang tai » hang tai, tang tai, sang tai
bieu cua » dieu cua, hieu cua, ben cua
dat ngoc » dat nuoc, dau ngoc, dang ngoc
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tai hoi » tai khoi, dai hoi, tai hai
ngoc va » nuoc va, ngoc ha, goc va
cua cua » cua chua, ca cua, qua cua
cua tre » cua te, cuu tre, cua triet

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 ky nang tai hoi. ((hieu qua) or (bieu cua)) dat ngoc va doanh cua cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang tai hoi. ((hieu qua) OR (bieu cua)) dat ngoc va doanh cua cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang tai hoi. ((hieu qua) or (bieu cua)) dat ngoc va doanh cua cua tre*.