Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
cuu tre » cua tre, cau tren, cau treo
vai cuu » vai cua
cac dac » cac dan, cac dai, cac bac
cac tac » cac toc, cac bac, cac tai
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
su cao » cu cao, vu cao, su co
su sac » su sach, su cac, su xac

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 cao)) ky tang ma hoi. hieu van ((cac tac) OR (cac dac)) va thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su cao)) ky tang ma hoi. hieu van ((cac tac) OR (cac dac)) va thanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su cao)) ky tang ma hoi. hieu van ((cac tac) OR (cac dac)) va thanh vai cuu tre*".