Perhaps you should try some spelling variations:
thien van » thi van
cam truc » cau truc, nam truc, lam truoc
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
dua tren » dung tren
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
truc va » thuc va, thuc vat, trung va
cu tren » tu tren
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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