Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
nang mai » nang ma, nang tai, lang mai
tu sach » thu sach, su sach, tu cach
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, dam thuc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
lo nang » ho nang, ly nang, loai nang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di 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) OR (te sach)) lo nang mai hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) lo nang mai hoi. hieu ve ((cam tuc) OR (nam thuc)) va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) lo nang mai hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) lo nang mai hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh vi cua tre*.