Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
phat duc » pham duc, phan duoc, pham duy
phan duc » pham duc, phan tu, phan dau
van hanh » van thanh, ban hanh, van anh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su hai, su dai
sai ky » sac ky
cua tu » cua tuc, cua su, cua cu

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