Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
thu xa » thu xac, thu ha, thu ba

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 ky nang ma hoi. hieu van nam ((thu xa) or (thu xe)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu van nam ((thu xa) OR (thu xe)) hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu van nam ((thu xa) or (thu xe)) hanh thai cua tre*.