Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh ban » thanh san, thanh bac, thanh bai
duc tang » duc thang, duc tan, tuc tang
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
su sac » su sach, su cac
ma hoi » mai hoi, xa hoi, ma hoa
su xac » pu xac, su cac
ve cam » ve cham, ve cac, va cam

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)) ky tang ma hoi. hieu ve cam duc tang ((thanh ban) OR (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky tang ma hoi. hieu ve cam duc tang ((thanh ban) OR (thanh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky tang ma hoi. hieu ve cam duc tang ((thanh ban) OR (thanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky tang ma hoi. hieu ve cam duc tang ((thanh ban) OR (thanh van)) cua tre*.