Perhaps you should try some spelling variations:
hoa duoc » hoa hoc
hoc duoc » hoc nuoc, hoc dung
va hanh » van hanh, va thanh, va danh
sach lo » sach dao, sach doi, sach hoi
hieu te » hieu ve, hien te, hieu he
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach ty
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach lo) or (sach tu)) lang xa hoi. hieu te ((hoc duoc) OR (hoa duoc)) va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach lo) OR (sach tu)) lang xa hoi. hieu te ((hoc duoc) OR (hoa duoc)) va hanh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach lo) or (sach tu)) lang xa hoi. hieu te ((hoc duoc) OR (hoa duoc)) va hanh vi cuu tre*".