Perhaps you should try some spelling variations:
phan loai » phan lap
hieu van » hieu va, thien van, lieu va
su triet » su viet, ve triet
cam truc » cau truc, nam truc, lam truoc
su tien » su kien, su hien, tu tieng
han lai » han tai, han li, nhan loai
nang ma » tang ma, sang ma, nang cao
truc va » thuc va, thuc vat, trung va
van cam » van nam, van lam, van cau
ma hoi » mai hoi, xa hoi, ma hoa
te van » le van, te va, ve van

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

• Performing a fuzzy search may retrieve terms with similar spellings: te van ky nang ma hoi. hieu van cam truc va ((han lai) OR (phan loai)) ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te van ky nang ma hoi. hieu van cam truc va ((han lai) OR (phan loai)) ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te van ky nang ma hoi. hieu van cam truc va ((han lai) OR (phan loai)) ((su triet) or (su tien))".
• Adding a wildcard symbol may retrieve word variants: te van ky nang ma hoi. hieu van cam truc va ((han lai) OR (phan loai)) ((su triet) or (su tien))*.