Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
lang van » dang van, tang van, hoang van
dang xay » dang van, van xay
thai cua » than cua, tai cuc, tri cua
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
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 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 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 cua tu*.