Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
hanh tai » thanh tai, hang tai, han tai
suc xanh » suc manh, suc canh, tuoc xanh
tu sach » thu sach, te sach, tu cach
cam suc » cam xuc, cao suc, cham soc
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
v nang » va nang, vu nang, van nang
ve cam » ve cham, ve cac, va cam

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 (su sach)) v nang xa hoi. hieu ve cam suc xanh hanh tai ((buu tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) v nang xa hoi. hieu ve cam suc xanh hanh tai ((buu tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) v nang xa hoi. hieu ve cam suc xanh hanh tai ((buu tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) v nang xa hoi. hieu ve cam suc xanh hanh tai ((buu tre) OR (cuu tre))*.