Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, te sach, tu cach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, dam thuc
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
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: ((tu sach) or (su sach)) ky tang ma hoa. lieu va ((cam tuc) or (nam thuc)) va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky tang ma hoa. lieu va ((cam tuc) OR (nam thuc)) va hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky tang ma hoa. lieu va ((cam tuc) or (nam thuc)) va hanh va cua tre*.