Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tinh cau » trinh cau, tinh cao, sinh cau
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve bao » te bao, va bao
ve co » vo co, va co, de co

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. hieu ((ve co) or (ve bao)) duc ((ban hanh) or (va thanh)) tinh cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu ((ve co) OR (ve bao)) duc ((ban hanh) OR (va thanh)) tinh cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu ((ve co) or (ve bao)) duc ((ban hanh) or (va thanh)) tinh cau tren*.