Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
hieu van » hieu va, thien van, lieu va
nam xuc » cam xuc, nam xua, nam thuc
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
vu sach » vu bach, su sach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa
cua cu » cua chu, cua cau, cua 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) or (vu sach)) ky tang ma hoi. hieu van nam xuc van ((thanh vai) OR (thanh tai)) cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky tang ma hoi. hieu van nam xuc van ((thanh vai) OR (thanh tai)) cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (vu sach)) ky tang ma hoi. hieu van nam xuc van ((thanh vai) OR (thanh tai)) cua cu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky tang ma hoi. hieu van nam xuc van ((thanh vai) OR (thanh tai)) cua cu*.