Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
nang duc » nang luc, nang doc, nang du
duc hai » cuc hai, duc dai, duc hau
qua cam » qua cham, qua cac, qua ca
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
cam tu » cam thu, nam tu, dam tu
vi cuu » vi luu, vinh cuu

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 khach)) ky nang duc hai. hieu qua cam tu va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (vu khach)) ky nang duc hai. hieu qua cam tu va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (vu khach)) ky nang duc hai. hieu qua cam tu va hanh vi cuu tre*.