Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
te sach » toc sach
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, tuc xa, duc va
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ma hoi. hieu van cham ((xuc va) or (((tuc va) OR (truc va)))) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu van cham ((xuc va) OR (((tuc va) OR (truc va)))) hanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. hieu van cham ((xuc va) or (((tuc va) OR (truc va)))) hanh dai cua tre*".