Perhaps you should try some spelling variations:
thanh oai » thanh hai, thanh tai, thanh toan
thanh dat » thanh san, thanh hai, thanh van
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cuu tre, cua triet, dua tren
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
ma khoi » mai khoi, ra khoi, xa khoi
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
va nam » van nam, ha nam, va nay
cua te » cua tu

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 y nang ma khoi. lieu va nam thuc va ((thanh oai) or (thanh dat)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma khoi. lieu va nam thuc va ((thanh oai) OR (thanh dat)) ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma khoi. lieu va nam thuc va ((thanh oai) or (thanh dat)) ((cua tre) or (cua te))*.