Perhaps you should try some spelling variations:
thien van » thi van
cac nuoc » hoc nuoc, dat nuoc, cua nuoc
cap nuoc » dat nuoc
dau treo » dau tren, cau treo, dau theo
te sach » toc sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
va dau » va dao

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 y nang xa hoi. thien van ((cac nuoc) or (cap nuoc)) va hanh va dau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. thien van ((cac nuoc) OR (cap nuoc)) va hanh va dau treo.
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. thien van ((cac nuoc) or (cap nuoc)) va hanh va dau treo*.