Perhaps you should try some spelling variations:
tang tai » hang tai, dung tai, sang tao
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
ky tang » ky nang, ky dang, kho tang
tai hoi » tai khoi, dai hoi, tai hai
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cua tu » cua tuc, cua su, cua te
xuc va » duc va, tuc va, luc va
cua cu » cua chu, cua cau, cua 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 sach ky tang tai hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vi ((cua tu) OR (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang tai hoi. ((hieu ve) OR (hieu va)) cam xuc va hanh vi ((cua tu) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang tai hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vi ((cua tu) OR (cua cu))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang tai hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vi ((cua tu) OR (cua cu))*.