Perhaps you should try some spelling variations:
thien van » thi van
thanh van » thanh san, thanh toan, thanh phan
thu sach » tu sach, thuat sach, thuoc sach
cam truc » cau truc, nam truc, lam truoc
thanh va » hanh va, thanh ha, thanh ve
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
truc va » thuc va, thuc vat, trung va
cu tren » tu tren, dua tren
y nang » ky nang, ly nang, v nang

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 cam truc va ((thanh va) OR (thanh van)) cu tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. thien van cam truc va ((thanh va) OR (thanh van)) cu tren".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. thien van cam truc va ((thanh va) OR (thanh van)) cu tren*.