Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
da thanh » dao thanh, dat thanh, dam thanh
cuu tre » cua tre, cau tren, cau treo
vai cuu » vai cua
cau tac » cau thac, cau tao, cuu tac
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
van cau » van dau, van hau, van chat
su sac » su sach, su cac
su cao » cu cao, vu cao, su co
su xac » pu xac, su cac
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((su sac) OR (su xac))) or (su cao)) ky tang ma hoi. hieu van cau tac da thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sac) OR (su xac))) OR (su cao)) ky tang ma hoi. hieu van cau tac da thanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((su sac) OR (su xac))) or (su cao)) ky tang ma hoi. hieu van cau tac da thanh vai cuu tre*".