Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
cuu tre » cua tre, cau tren, cau treo
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
sai ky » sac ky
vi cuu » vi luu, vinh cuu
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((mang may) or (nang x)) hoi. hieu ve cac xuc ((van hanh) or (va thanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((mang may) OR (nang x)) hoi. hieu ve cac xuc ((van hanh) OR (va thanh)) vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((mang may) or (nang x)) hoi. hieu ve cac xuc ((van hanh) or (va thanh)) vi cuu tre*.