Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
chat xuc » chat huu, cam xuc, chao xu
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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 thieu nang ma hoi. hieu va chat xuc ((va thanh) or (van hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu nang ma hoi. hieu va chat xuc ((va thanh) OR (van hanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach thieu nang ma hoi. hieu va chat xuc ((va thanh) or (van hanh)) vi cua tre*.