Perhaps you should try some spelling variations:
tham soc » cham soc, tham nuoc, thai son
va thanh » gia thanh, ban thanh, le thanh
tinh cuu » trinh cuu, dinh cuu, tinh cua
va tinh » may tinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
cuu tre » cua 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: te sach ky nang xa hoi. ((hieu va) or (hieu qua)) tham soc ((va thanh) OR (va tinh)) tinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. ((hieu va) OR (hieu qua)) tham soc ((va thanh) OR (va tinh)) tinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. ((hieu va) or (hieu qua)) tham soc ((va thanh) OR (va tinh)) tinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu va) or (hieu qua)) tham soc ((va thanh) OR (va tinh)) tinh cuu tre*.