Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
da thanh » dao thanh, dat thanh, dam thanh
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cua triet, dua tren
van hac » van hoc, van ha, van hai
sach ky » sac ky, sach y, sach ty
van bac » van ban, van bao, dan bac
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky lang xa hoi. thien ((van bac) or (van hac)) tac da thanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. thien ((van bac) OR (van hac)) tac da thanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. thien ((van bac) or (van hac)) tac da thanh vi ((cua tre) or (cuu tre))*.