Perhaps you should try some spelling variations:
thien van » thi van
vat thanh » dat thanh, gat thanh, tat thanh
thanh vai » thanh hai, thanh van, thanh tai
cau thuc » cau truc, cuu thuc, can thuc
cua viet » ca viet, hoa viet, cua vat
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua

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 ty) OR (sach y)) nang xa hoi. ((thien van) or (hieu va)) cau thuc vat thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang xa hoi. ((thien van) OR (hieu va)) cau thuc vat thanh vai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) nang xa hoi. ((thien van) or (hieu va)) cau thuc vat thanh vai cua viet*".