Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
cua tre » cuu tre, cua triet, dua tren
anh hai » lanh hai, manh hai, anh thai
tan anh » tuan anh, tran anh, toan anh
suc tan » duc tan, suc manh, tuc tang
cao suc » cao su, cao duc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va cao » va cac, va co, va dao
cua te » cua tu

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. hieu va cao suc tan anh hai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. hieu va cao suc tan anh hai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (nang ma)) hoi. hieu va cao suc tan anh hai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (nang ma)) hoi. hieu va cao suc tan anh hai ((cua tre) OR (cua te))*.