Perhaps you should try some spelling variations:
vien hanh » vien thanh, hien hanh, nien hanh
hieu vien » hieu hien, hieu viec, thieu nien
trinh vat » trinh van, trinh luat, sinh vat
nang xay » dang xay, nganh xay, nang xuan
phuc lap » phuc tap, phuc lai, phan lap
xay hoi » xa hoi, tay hoi, cay phoi
chu tre » cho tre, chu tri, cau tren
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai 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 sac ky nang xay hoi. hieu vien hanh phuc lap trinh vat ((chu tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xay hoi. hieu vien hanh phuc lap trinh vat ((chu tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xay hoi. hieu vien hanh phuc lap trinh vat ((chu tre) or (cuu tre))*.