Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
thuc dan » thuc hanh, hoc dan, thuc vat
hanh va » hang va, hanh vi
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
thi van » thi lan, thi hanh, thi nang
xuc va » duc va, tuc va, luc va
va cau » van cau, va cac, va dau

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 ((nang xa) OR (nang ma)) hoi. thi van cam ((xuc va) or (thuc dan)) hanh va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. thi van cam ((xuc va) OR (thuc dan)) hanh va cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) OR (nang ma)) hoi. thi van cam ((xuc va) or (thuc dan)) hanh va cau treo".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) OR (nang ma)) hoi. thi van cam ((xuc va) or (thuc dan)) hanh va cau treo*.