Perhaps you should try some spelling variations:
ngang cho » nang cho, ngang tho, sang cho
van hanh » van thanh, ban hanh, van anh
sach ty » sach tu, sach thu, xach tay
cho hoc » co hoc, khoa hoc
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
ve cac » va cac, vien cac
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ty) OR (sach y)) ngang cho hoc. hieu ve cac xuc van hanh ((vi cua) or (di cua)) chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ty) OR (sach y)) ngang cho hoc. hieu ve cac xuc van hanh ((vi cua) OR (di cua)) chu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ty) OR (sach y)) ngang cho hoc. hieu ve cac xuc van hanh ((vi cua) or (di cua)) chu*".