Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
sach tu » sach thu, cach tu, sach uu
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu su, dieu vu
sach ty » sach y, sach thu, xach tay
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
cua tu » cua tuc, cua su, cua cu
soc va » hoc va, loc va, doc va

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