Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
kho tang » cao tang
dinh dat » dinh ket, dinh van, dinh lam
tu sach » thu sach, su sach, tu cach
dat cua » dai cua, day cua, mat cua
te sach » toc sach
tang ma » mang may, tang van
hieu ke » hieu kem, chieu ke, hieu ky
phuc va » phuc vu, thuc va, chuc va
ke cau » ket cau
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) kho tang ma hoa. hieu ke cau ((phuc va) or (thuc dan)) dinh dat cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) kho tang ma hoa. hieu ke cau ((phuc va) OR (thuc dan)) dinh dat cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) kho tang ma hoa. hieu ke cau ((phuc va) or (thuc dan)) dinh dat cua te*.