Perhaps you should try some spelling variations:
lam duoc » nam duoc, luat duoc, lam thuoc
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
lam luc » lao luc
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, 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 sach y ((nang xa) or (nang ma)) hoi. lieu va ((lam luc) OR (lam duoc)) va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang ma)) hoi. lieu va ((lam luc) OR (lam duoc)) va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (nang ma)) hoi. lieu va ((lam luc) OR (lam duoc)) va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (nang ma)) hoi. lieu va ((lam luc) OR (lam duoc)) va hanh vi cua tre*.