Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
sang ma » tang ma, nang ma, sang tao
cuu tre » cua tre, cau tren, cau treo
tac xa » tuc xa, tac da
tuc va » thuc va, truc va, tuc xa
vi cuu » vi luu, vinh cuu

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 ky ((nang x) or (sang ma)) hoi. thien van cam ((tac xa) or (tuc va)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang x) OR (sang ma)) hoi. thien van cam ((tac xa) OR (tuc va)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang x) or (sang ma)) hoi. thien van cam ((tac xa) or (tuc va)) hanh vi cuu tre*.