Perhaps you should try some spelling variations:
phat hoc » phap hoc, phau hoc, chat hoc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
hanh le » thanh le, hanh ve, hanh de
huu tre » cuu tre, huu them, huu tien
huu tri » huu tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang cao hoi. ((hieu va) or (lieu va)) phat hoc va hanh le ((huu tre) OR (huu tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. ((hieu va) OR (lieu va)) phat hoc va hanh le ((huu tre) OR (huu tri))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cao hoi. ((hieu va) or (lieu va)) phat hoc va hanh le ((huu tre) OR (huu tri))*".