Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
thi hanh » thi thanh
nang xa » nang x, lang xa, nang ma
duoc va » nuoc va, duc va, duong va
duoc ma » duoc lam
tinh de » tinh da, sinh de, tinh he
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. ((thien van) or (thi hanh)) lam ((duoc va) OR (duoc ma)) tinh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. ((thien van) OR (thi hanh)) lam ((duoc va) OR (duoc ma)) tinh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. ((thien van) or (thi hanh)) lam ((duoc va) OR (duoc ma)) tinh de cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. ((thien van) or (thi hanh)) lam ((duoc va) OR (duoc ma)) tinh de cua tre*.