Perhaps you should try some spelling variations:
gat thanh » dat thanh, tat thanh, vat thanh
thanh vi » hanh vi, thanh va, thanh ve
thuc gat » thuc vat, thuc giai, thuc hoat
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
so sach » so sanh, bo sach, co sach
te sach » toc sach
vi cuu » vi luu, vinh cuu
ma hoi » mai hoi, xa hoi, ma hoa

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 (te sach))) or (so sach)) ky nang ma hoi. hieu van nam thuc gat thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (te sach))) OR (so sach)) ky nang ma hoi. hieu van nam thuc gat thanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (te sach))) or (so sach)) ky nang ma hoi. hieu van nam thuc gat thanh vi cuu tre*.