Perhaps you should try some spelling variations:
thien van » thi van
hanh vai » hanh vi, hanh va, hanh tai
tang van » dang van, hoang van, trong van
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
dau tuc » dau tu, dao tuc, cau truc
van dau » van dao, phan dau
tang ma » mang may
sac ky » sai ky
tuc va » thuc va, truc va, tuc xa

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) OR (cac ky)) ((tang ma) or (tang van)) hoi. thien van dau tuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) ((tang ma) OR (tang van)) hoi. thien van dau tuc va hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) ((tang ma) or (tang van)) hoi. thien van dau tuc va hanh vai cua tre*".