Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
va thanh » gia thanh, ban thanh, va tinh
dua tren » dung tren
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
cu tren » tu tren
x hoi » xa hoi, o hoi, x ho

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) or (thu hoach)) ky nang x hoi. hieu van nam thuc va thanh van ((cu tren) OR (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu hoach)) ky nang x hoi. hieu van nam thuc va thanh van ((cu tren) OR (dua tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu hoach)) ky nang x hoi. hieu van nam thuc va thanh van ((cu tren) OR (dua tren))*".