Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cai nuoc » cap nuoc, cac nuoc, cuoi nuoc
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
danh du » danh dau, danh tu, dinh du
ve cai » va cai, ve cac, ve tai
du cau » cu cau, da cau, di cau

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 ty nang xa hoi. hieu ve cai nuoc va danh du cau tren~.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang xa hoi. hieu ve cai nuoc va danh du cau tren*.