Perhaps you should try some spelling variations:
truc va » thuc va, thuc vat, trung va
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
sai ky » sac ky
ve cam » ve cham, ve cac, ve cai
te sai » te tai, te bai, te lai

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: te sai ky nang x ho. hieu ((ve cam) OR (va cam)) truc va ((hang di) OR (hang vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky nang x ho. hieu ((ve cam) or (va cam)) truc va ((hang di) OR (hang vi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sai ky nang x ho. hieu ((ve cam) or (va cam)) truc va ((hang di) OR (hang vi)) cua tre*.