Perhaps you should try some spelling variations:
tang dai » tang tai, lang dai, tang da
tang dan » tang van, tung dan, tang luan
hieu vu » hieu va, hieu ve, hieu su
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
xuc va » duc va, tuc va, luc va
vu cam » vu cham, vu cao, va cam
tu sac » tu cac, tu san, tu bac
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) OR (tu sach)) ky ((tang dai) or (tang dan)) hoi. hieu vu cam xuc va hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky ((tang dai) OR (tang dan)) hoi. hieu vu cam xuc va hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky ((tang dai) or (tang dan)) hoi. hieu vu cam xuc va hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky ((tang dai) or (tang dan)) hoi. hieu vu cam xuc va hanh vi cua tu*.