Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
dang xay » dang van, van xay
anh thai » anh thi, anh tai, tranh thai
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hieu vu » hieu ve, hieu su, dieu vu
sach ty » sach y, sach tu, sach thu
xay hoi » xa hoi, tay hoi, cay phoi
ty dang » ty xang, ky dang, ty hang
soc va » hoc va, loc va, doc va
cua tu » cua tuc, cua su, cua cu

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 dang xay hoi. ((hieu vu) OR (hieu va)) cham soc va ((anh thai) or (nhanh thai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty dang xay hoi. ((hieu vu) OR (hieu va)) cham soc va ((anh thai) OR (nhanh thai)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty dang xay hoi. ((hieu vu) OR (hieu va)) cham soc va ((anh thai) or (nhanh thai)) cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ty dang xay hoi. ((hieu vu) OR (hieu va)) cham soc va ((anh thai) or (nhanh thai)) cua tu*.