Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thanh ki » thanh kim, thanh ky, thanh ke
xa thanh » va thanh, ha thanh, ta thanh
vien cac » vien bach, vien dai, gian cac
hang o2 » hang hoa, hang rok, hang ton
sach ty » sach y, sach tu, sach thu
vien da » vien dai, hien dai
tu sach » thu sach, su sach, te sach
hang o » hang do, hoang o, thang o
ki su » ky 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 ty ((hang o) or (hang o2)) hoi. hieu ((vien cac) or (vien da)) tuc xa thanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((hang o) OR (hang o2)) hoi. hieu ((vien cac) OR (vien da)) tuc xa thanh ki su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((hang o) or (hang o2)) hoi. hieu ((vien cac) or (vien da)) tuc xa thanh ki su triet*.