Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cam lo » cam ly, cam o
y nang » ky nang, ly nang, v nang
nam lo » nam bo, nam so
nam co » nam cao, nam bo, nam so
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. hieu va ((cam lo) or (((nam lo) OR (nam co)))) va thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu va ((cam lo) OR (((nam lo) OR (nam co)))) va thanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. hieu va ((cam lo) or (((nam lo) OR (nam co)))) va thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu va ((cam lo) or (((nam lo) OR (nam co)))) va thanh tai cua tre*.