Perhaps you should try some spelling variations:
tang luan » dung luan
tang dan » tang van, tung dan, tang quan
hieu sau » hieu su, hieu suat, tieu su
cam tuc » cam xuc, cam tu, nam thuc
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, ban hanh
sau cam » sau lam, cau cham, sau chan
va cua » va chua, via cua, ca cua
tu sac » tu sach, tu cac, tu san
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky
cua te » cua tu

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 ky ((tang dan) or (tang luan)) hoi. hieu sau cam tuc va hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((tang dan) OR (tang luan)) hoi. hieu sau cam tuc va hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((tang dan) or (tang luan)) hoi. hieu sau cam tuc va hanh va cua te*.