Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
cach thuc » anh thuc, cac thu
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
hieu va » lieu va, hieu qua
va cach » va cac
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thieu nang x hoi. hieu va cach thuc dan hanh tai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thieu nang x hoi. hieu va cach thuc dan hanh tai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach thieu nang x hoi. hieu va cach thuc dan hanh tai ((cua tre) or (cuu tre))*.