Perhaps you should try some spelling variations:
thuc ban » thuoc ban, thuc dan, thu ban
phuc ban » phuc van, thuoc ban, phuc hang
cuu tre » cau tren, cau treo
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
cua tre » cua te, cua triet, dua tren
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
te sai » te tai, te bai, te lai
sai ky » sac ky
ve cau » ke cau, va cau, ve cac
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky dang ha hoi. hieu ve cau ((phuc ban) OR (thuc ban)) hanh de ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky dang ha hoi. hieu ve cau ((phuc ban) OR (thuc ban)) hanh de ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky dang ha hoi. hieu ve cau ((phuc ban) OR (thuc ban)) hanh de ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sai ky dang ha hoi. hieu ve cau ((phuc ban) OR (thuc ban)) hanh de ((cua tre) or (cuu tre))*.