Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thao duoc » tao duoc, thao duong, thuat duoc
thien van » thi van
va hanh » van hanh, va thanh, va danh
duoc va » nuoc va, duc va, duoc ma
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
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: thuat sach tu ((nang xa) OR (nang x)) hoi. ((hieu ve) or (thien van)) thao duoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach tu ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (thien van)) thao duoc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach tu ((nang xa) OR (nang x)) hoi. ((hieu ve) or (thien van)) thao duoc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach tu ((nang xa) OR (nang x)) hoi. ((hieu ve) or (thien van)) thao duoc va hanh vi cua tre*.