Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cam tuc » cam xuc, cam tu, nam thuc
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
tai hai » thi hai, dai hai, tai ha
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua cu, cua te
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: su ((sach ky) or (sac ky)) sang tai hai. hieu ve cam tuc va danh vi ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) sang tai hai. hieu ve cam tuc va danh vi ((cua tu) OR (cua su))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) sang tai hai. hieu ve cam tuc va danh vi ((cua tu) OR (cua su))*".