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
van lam » van nam
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ky anh » ky danh, ly anh, ty anh

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 dang) or (ky anh)) ma hoi. hieu van lam ((xuc va) OR (tuc va)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky dang) OR (ky anh)) ma hoi. hieu van lam ((xuc va) OR (tuc va)) hanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky dang) or (ky anh)) ma hoi. hieu van lam ((xuc va) OR (tuc va)) hanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky dang) or (ky anh)) ma hoi. hieu van lam ((xuc va) OR (tuc va)) hanh thai cua tre*.