Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
van hanh » van thanh, ban hanh, van anh
ty ngang » ly ngan, te ngan, tu ngan
luc van » luoc van, luu van, duc van
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
hoc cac » hoc cao
cua cau » cua cac, cua chu, cua cay
ve cau » ke cau, va cau, ve cac
vi cua » vai cua, di cua

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

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