Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
so sach » so sanh, co sach, hoc sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
tai hai » thi hai, dai hai, tai ha
ky sang » ky nang, ky dang, ky tang
bo sach » co sach, hoc sach
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
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: ((so sach) or (bo sach)) ky sang tai hai. hieu va cam luc va danh vi ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky sang tai hai. hieu va cam luc va danh vi ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) ky sang tai hai. hieu va cam luc va danh vi ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ky sang tai hai. hieu va cam luc va danh vi ((cua tu) OR (cua su))*.