Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
kho mang » kho tang, cho mang, pho mang
sai kho » dai kho, tai khoa, dai khoa
may hoi » may thoi, tay hoi, mai hoi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc tan, duc manh, duc phan
su sai » su tai, su hai, su dai
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai kho mang may hoi. hieu va cham ((duc van) or (duc va)) hanh thai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai kho mang may hoi. hieu va cham ((duc van) OR (duc va)) hanh thai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai kho mang may hoi. hieu va cham ((duc van) or (duc va)) hanh thai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: su sai kho mang may hoi. hieu va cham ((duc van) or (duc va)) hanh thai ((cua te) OR (cua tu))*.