Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
lai cua » dai cua, hai cua, lai chau
va hanh » va thanh, va danh, ban hanh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve cam » ve cham, ve cac, va cam
cac tu » cac thu, cach tu, cac du

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

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