Perhaps you should try some spelling variations:
hanh dao » lanh dao, thanh dat, thanh dam
hieu va » lieu va, hieu qua
dao cua » dai cua, day cua, dan cua
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
tang xa » trang xa, lang xa, tang ha
cai ky » cao ky, cac ky, cam ky
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
tu cai » tu cac, tu can, tu bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cai ky ((tang xa) OR (tang ma)) hoi. hieu va cam luc va hanh dao cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ky ((tang xa) OR (tang ma)) hoi. hieu va cam luc va hanh dao cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cai ky ((tang xa) OR (tang ma)) hoi. hieu va cam luc va hanh dao cua tre*.