Perhaps you should try some spelling variations:
hinh thai » sinh thai, tinh thai, dinh thi
hanh thai » nhanh thai, hanh tai, anh thai
dang xay » dang van, van xay
lang van » dang van, tang van, hoang van
su sach » so sach, vu sach
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sach ty » sach y, sach tu, sach thu
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: su sach ty ((dang xay) or (lang van)) hoi. hieu vu cham soc va ((hanh thai) OR (hinh thai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((dang xay) OR (lang van)) hoi. hieu vu cham soc va ((hanh thai) OR (hinh thai)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((dang xay) or (lang van)) hoi. hieu vu cham soc va ((hanh thai) OR (hinh thai)) cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((dang xay) or (lang van)) hoi. hieu vu cham soc va ((hanh thai) OR (hinh thai)) cua tu*.