Perhaps you should try some spelling variations:
hoc kinh » hoc sinh, luoc kinh
kinh ky » minh ky, trinh ky, kinh tay
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
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: hoc kinh ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (lieu va)) cam xuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kinh ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (lieu va)) cam xuc va hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc kinh ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (lieu va)) cam xuc va hanh vi cua tre*".