Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
dua tren » dung tren
suc xanh » suc manh, suc canh, tuoc xanh
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach kem
cao suc » cao su, cao duc
ve cao » va cao, ve bao, ve cac
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: thu ((sach ky) OR (sach ty)) nang xa hoi. hieu ve cao suc xanh hanh tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) nang xa hoi. hieu ve cao suc xanh hanh tai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach ty)) nang xa hoi. hieu ve cao suc xanh hanh tai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sach ty)) nang xa hoi. hieu ve cao suc xanh hanh tai ((dua tren) or (cua te))*.