Perhaps you should try some spelling variations:
viet triet » viet tien, viet trinh, viet viet
thai viet » thi viet, tai viet, mai viet
hanh thai » nhanh thai, hinh thai, hanh tai
thuc va » thuc dan, thuc day
hieu ve » hieu va, hieu van
hoa doi » hoa dai, hoc doi, xoa doi
hoa hoi » khoa hoi, hoa hoc, hoc hoi
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve nam ((thuc va) or (thuc vat)) hanh thai viet triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ((hoa hoi) OR (hoa doi)). hieu ve nam ((thuc va) OR (thuc vat)) hanh thai viet triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve nam ((thuc va) or (thuc vat)) hanh thai viet triet*.