Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
duc manh » suc manh, duc anh, duc minh
va triet » va thiet, va trien, ve triet
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
hanh de » hanh ve, hanh kem
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky

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 ky nang xa hoi. hieu van pham duc manh hanh de ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky nang xa hoi. hieu van pham duc manh hanh de ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu bai ky nang xa hoi. hieu van pham duc manh hanh de ((va triet) or (cua viet))*.