Perhaps you should try some spelling variations:
tang tai » hang tai, dung tai, sang tao
nang tai » hang tai, sang tai, nang cao
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
su cac » tu cac, su cao, su can
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 cac ky ((nang tai) or (tang tai)) roi. hieu ve cam luc ((va hanh) OR (van hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky ((nang tai) OR (tang tai)) roi. hieu ve cam luc ((va hanh) OR (van hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky ((nang tai) or (tang tai)) roi. hieu ve cam luc ((va hanh) OR (van hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su cac ky ((nang tai) or (tang tai)) roi. hieu ve cam luc ((va hanh) OR (van hanh)) vai cua tre*.