Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
nang mai » nang ma, lang mai, nang cai
nang tai » hang tai, tang tai, sang tai
anh thai » anh thi, anh tai, tranh thai
cua tre » cua te, cuu tre, cua triet
cac dac » cac dan, cac dai, cac bac
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
dac va » duc va, day va, dat va
su cac » tu cac, su cao, su can

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky ((nang mai) OR (nang tai)) hoi. hieu ve cac dac va ((anh thai) OR (nhanh thai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky ((nang mai) or (nang tai)) hoi. hieu ve cac dac va ((anh thai) OR (nhanh thai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su cac ky ((nang mai) or (nang tai)) hoi. hieu ve cac dac va ((anh thai) OR (nhanh thai)) cua tre*.