Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
so sanh » do sanh
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va danh, ban hanh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
sanh y » sinh y, anh y, hanh y
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y ((lang xa) or (lang ha)) hoi. hieu va cam duc ((va hanh) OR (va thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((lang xa) OR (lang ha)) hoi. hieu va cam duc ((va hanh) OR (va thanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh y ((lang xa) or (lang ha)) hoi. hieu va cam duc ((va hanh) OR (va thanh)) vai cua tre*".