Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cuc tre » duc tre, cua tre, cuu tre
cam duc » cao duc, pham duc, nam duoc
hieu va » lieu va, hieu qua
hieu ve » hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
sai ky » sac ky
su sai » su tai, su hai, su dai

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