Perhaps you should try some spelling variations:
sang tao » hang tai
sach thu » sach thue, sach thieu, sach tham
tinh ve » trinh ve, tinh ven, dinh ve
soc may » hoc may, so may
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sach ty » sach y, sach tu, xach tay
sang ma » tang ma, nang ma, mang may
cua tuc » cua duc, cua tu, cua thuoc
ve cua » le cua, de cua, te cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) OR (sach thu)) ((sang ma) or (sang tao)) hoi. hieu vu cham soc may tinh ve cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) ((sang ma) OR (sang tao)) hoi. hieu vu cham soc may tinh ve cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) ((sang ma) or (sang tao)) hoi. hieu vu cham soc may tinh ve cua tuc".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach thu)) ((sang ma) or (sang tao)) hoi. hieu vu cham soc may tinh ve cua tuc*.