Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
hanh dai » hanh tai, hanh dao, thanh dam
vanh dai » van dai, vanh tai, lanh dao
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
van cam » van nam, van lam, van cau
cao hoi » cau hoi, co hoi, cao hoc
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang cao hoi. hieu van cam cuc ban ((((hanh dai) OR (thanh dat))) or (vanh dai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoi. hieu van cam cuc ban ((((hanh dai) OR (thanh dat))) OR (vanh dai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang cao hoi. hieu van cam cuc ban ((((hanh dai) OR (thanh dat))) or (vanh dai)) cua tre*".