Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach
cam luc » cam xuc, cau luc
va hanh » van hanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
ang xa » lang xa, mang xa, dang xay
tu ang » tu lang, tu anc, tu anh
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khach)) tu ang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) tu ang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khach)) tu ang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) tri cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) tu ang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) tri cua tre*.