Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
nang cau » nang cao, hang cau, nang dau
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
sach ky » sac ky, sach ty, sach kem
thuc va » thuc vat, thuc dan, thuc day
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: su ((sach ky) or (sach y)) nang cau hoi. hieu va nam thuc va thanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang cau hoi. hieu va nam thuc va thanh vai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) nang cau hoi. hieu va nam thuc va thanh vai ((cua tre) or (cua te))*.