Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hanh ca » hanh cac, hanh cat, hanh cua
va hanh » van hanh, va thanh, va danh
cac toc » cac toi, cac nuoc, cac thoi
cuu tre » cua tre, cau tren, cau treo
cac tuc » cac tac, cac nuoc, cac cuoc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cac tu » cac thu, cach tu, cac du
ma hoi » mai hoi, xa hoi, ma hoa
ca cuu » cap cuu, cua cuu, 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: tu sach ty nang ma hoi. hieu va ((((cac tuc) OR (cac tu))) or (cac toc)) va hanh ca cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. hieu va ((((cac tuc) OR (cac tu))) OR (cac toc)) va hanh ca cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. hieu va ((((cac tuc) OR (cac tu))) or (cac toc)) va hanh ca cuu tre*".