Perhaps you should try some spelling variations:
thien van » thi van
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
cac dai » cac dan, cac bai, can dai
cuu tre » cau tren, cau treo
cac tac » cac toc, cac bac, cac dac
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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 ((cac tac) or (cac dai)) va 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 ((cac tac) OR (cac dai)) va thanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. thien van ((cac tac) or (cac dai)) va thanh vi ((cua tre) or (cuu tre))*.