Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
ve triet » va trien, su triet
thanh la » thanh lap, thanh lam, thanh lan
thu sach » thuat sach, thuoc sach, thu hoach
nam thuc » nam thuoc, am thuc, nam thu
thi hanh » thi thanh
hieu ve » hieu va, hieu van
tu sach » su sach, tu cach, vu sach
hanh xa » hanh va, hanh ma, hanh xu
te sach » toc sach
ve nam » he nam, va nam, le nam
la ve » ly ve, ca ve, va ve

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 (thu sach))) or (te sach)) thi hanh xa hoi. hieu ve nam thuc vat thanh la ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (te sach)) thi hanh xa hoi. hieu ve nam thuc vat thanh la ve triet.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (thu sach))) or (te sach)) thi hanh xa hoi. hieu ve nam thuc vat thanh la ve triet*.