Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
phat duc » pham duc, phan duc, phan duoc
van hanh » van thanh, ban hanh, van anh
ky dang » ky nang
ky danh » ky anh
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc manh
cua tre » cuu tre, cua triet, dua tren
su sai » su tai, su hai, su dai
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ((ky dang) OR (ky danh)) xa hoi. hieu va phat duc van hanh thai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ((ky dang) OR (ky danh)) xa hoi. hieu va phat duc van hanh thai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ((ky dang) OR (ky danh)) xa hoi. hieu va phat duc van hanh thai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sai ((ky dang) OR (ky danh)) xa hoi. hieu va phat duc van hanh thai ((cua tre) or (cua te))*.