Perhaps you should try some spelling variations:
kho tang » cao tang
hanh vai » hanh vi, hanh va, hanh tai
hieu su » hieu sau, tieu su, hieu so
va hanh » van hanh, va thanh, va danh
dai hoi » dai hoc, dai moi
dai hai » dai han, dai tai, dai thao
sac kho » suc khoe, cac khoi, dac khoa
cua tu » cua tuc, cua cu, cua te
tu sac » tu sach, tu cac, tu san
xuc va » duc va, tuc va, luc va
su cam » su nam, su cao, su can
cua su » qua su

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 tang ((dai hoi) or (dai hai)). hieu su cam xuc va hanh vai ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac kho tang ((dai hoi) OR (dai hai)). hieu su cam xuc va hanh vai ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac kho tang ((dai hoi) or (dai hai)). hieu su cam xuc va hanh vai ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: tu sac kho tang ((dai hoi) or (dai hai)). hieu su cam xuc va hanh vai ((cua tu) OR (cua su))*.