Perhaps you should try some spelling variations:
thien van » thi van
thanh van » thanh san, thanh toan, thanh phan
va thanh » gia thanh, ban thanh, va tinh
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
thu va » thuc va, thue va, tu va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky lang) OR (ky tang)) xa hoi. thien van nam thu va thanh van ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky lang) OR (ky tang)) xa hoi. thien van nam thu va thanh van ((cua tre) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky lang) OR (ky tang)) xa hoi. thien van nam thu va thanh van ((cua tre) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky lang) OR (ky tang)) xa hoi. thien van nam thu va thanh van ((cua tre) or (cua tu))*.