Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham cuu » cap cuu, chat cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
tu san » thu san, tu ban, tu can
va dan » ca dan, va dao, va dau
di cua » dai cua, doi cua, de cua
tu bai » tu ban, tu bat, te 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 bai) OR (tu san)) ky nang xa hoi. hieu va cham cuu ((van hanh) OR (va dan)) di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bai) OR (tu san)) ky nang xa hoi. hieu va cham cuu ((van hanh) OR (va dan)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu bai) OR (tu san)) ky nang xa hoi. hieu va cham cuu ((van hanh) OR (va dan)) di cua tre*.