Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
vu sac » vu sach, va sac, vu cac
vu san » va san, vu ban
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sac) OR (vu san)) ky sang ma hoi. hieu van nam ((thuc vat) OR (hoc dan)) hanh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: ((vu sac) or (vu san)) ky sang ma hoi. hieu van nam ((thuc vat) or (hoc dan)) hanh vi cua te*.