Perhaps you should try some spelling variations:
thien van » thi van
chat dat » luat dat, chat va, cai dat
chap dat » phap day, cai dat, lap dat
sach ty » sach tu, sach thu, xach tay
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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) or (sach ty)) nang ma hoi. thien van ((chat dat) OR (chap dat)) va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach y) OR (sach ty)) nang ma hoi. thien van ((chat dat) OR (chap dat)) va hanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach y) or (sach ty)) nang ma hoi. thien van ((chat dat) OR (chap dat)) va hanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: thu ((sach y) or (sach ty)) nang ma hoi. thien van ((chat dat) OR (chap dat)) va hanh vi cua vat*.