Perhaps you should try some spelling variations:
vat hanh » vat thanh, van hanh, va hanh
hoc sach » hoc sinh, hoc cac, hoc anh
nham thu » nham thuc, nam thu, pham thu
san nham » san pham, san nhat, lanh nham
hieu san » hieu van, hieu sau, chieu sang
tu cach » tu cac
thu vat » thuc vat, thu va, thuat vat
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (hoc sach)) ky ((nang xa) OR (nang x)) hoi. hieu san nham thu vat hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (hoc sach)) ky ((nang xa) OR (nang x)) hoi. hieu san nham thu vat hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (hoc sach)) ky ((nang xa) OR (nang x)) hoi. hieu san nham thu vat hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (hoc sach)) ky ((nang xa) OR (nang x)) hoi. hieu san nham thu vat hanh vi cua tre*.