Perhaps you should try some spelling variations:
thieu mien » thieu nien, thieu bien, hieu hien
cau tren » cu tren, dau tren, ca tren
mien dat » tien dat, hien dai, vien dai
dat duoc » dat nuoc, da duoc, luat duoc
van hoc » van hoa
duoc va » nuoc va, duc va, duoc ma
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau treo
so sach » so sanh, bo sach, co sach
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y lang ((van loi) or (van hoc)). thieu mien dat duoc va hanh di ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y lang ((van loi) OR (van hoc)). thieu mien dat duoc va hanh di ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: so sach y lang ((van loi) or (van hoc)). thieu mien dat duoc va hanh di ((cuu tre) or (cau tren))*.