Perhaps you should try some spelling variations:
cam truc » cau truc, nam truc, lam truoc
vu kham » vu khanh
qua cam » qua cham, qua cac, qua ca
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu bach) or (vu kham)) ky nang x ho. hieu qua cam truc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (vu kham)) ky nang x ho. hieu qua cam truc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (vu kham)) ky nang x ho. hieu qua cam truc va hanh di cua tre*.