Perhaps you should try some spelling variations:
te sach » toc sach
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach vu » sach va, sach tu, sach uu
qua cam » qua cham, qua cac, qua ca
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
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: te sach vu ((nang xa) OR (nang ma)) hoi. hieu qua cam xuc ((va hanh) or (va danh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu ((nang xa) OR (nang ma)) hoi. hieu qua cam xuc ((va hanh) OR (va danh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu ((nang xa) OR (nang ma)) hoi. hieu qua cam xuc ((va hanh) or (va danh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach vu ((nang xa) OR (nang ma)) hoi. hieu qua cam xuc ((va hanh) or (va danh)) vi cua tre*.