Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
thuc van » thuc vat, thuc dan, thuc va
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
hoa hoi » khoa hoi, hoa hoc, hoa doi
van anh » van thanh, tuan anh, van minh
ho hoi » hoc hoi, hoi hoi, co hoi
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua
su cac » tu cac, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang ((ho hoi) or (hoa hoi)). hieu van tham thuc van anh ((di cua) OR (de cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang ((ho hoi) OR (hoa hoi)). hieu van tham thuc van anh ((di cua) OR (de cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang ((ho hoi) or (hoa hoi)). hieu van tham thuc van anh ((di cua) OR (de cua)) triet*".