Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hieu vien » hieu hien, thieu nien, hieu tieng
thuy san » thuat san, thuy anh
thu san » thu ban, phu san, thuat san
hanh di » hanh vi, hanh de, hang di
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
di cua » dai cua, doi cua, de cua
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: ((thu san) or (thuy san)) ky nang xa hoi. ((hieu vien) OR (hieu viec)) cac duc va hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu san) OR (thuy san)) ky nang xa hoi. ((hieu vien) OR (hieu viec)) cac duc va hanh di cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu san) or (thuy san)) ky nang xa hoi. ((hieu vien) OR (hieu viec)) cac duc va hanh di cua tu*".