Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
hoc thuc » hoc huu
hieu van » hieu va, thien van, lieu va
su sach » so sach
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
dan han » dan chan, dan than, dan hanh
van hoc » van hoa
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vu sach » vu bach, vu khach

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 sach) OR (vu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu van hoc thuc dan han tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky ((nang xa) or (nang ma)) hoi. hieu van hoc thuc dan han tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky ((nang xa) or (nang ma)) hoi. hieu van hoc thuc dan han tai cua tre*.