Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
dai hai » dai han, dai tai, dai thao
hieu su » hieu sau, tieu su, hieu so
vai cua » dai cua, hai cua, lai cua
dai hoi » dai hoc, dai moi
va hanh » van hanh, va thanh, va danh
sac kho » cac khoi, dac khoa, cac khoa
xuc va » duc va, tuc va, luc va
su cam » su nam, su cao, su can
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: tu ((sac kho) OR (suc khoe)) tang ((dai hoi) or (dai hai)). hieu su cam xuc va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac kho) OR (suc khoe)) tang ((dai hoi) OR (dai hai)). hieu su cam xuc va hanh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac kho) OR (suc khoe)) tang ((dai hoi) or (dai hai)). hieu su cam xuc va hanh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: tu ((sac kho) OR (suc khoe)) tang ((dai hoi) or (dai hai)). hieu su cam xuc va hanh vai cua tu*.