Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
te sach » toc sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
duc van » duc tan, duc manh, duc phan
cua tuc » cua duc, cua tu, cua thuoc
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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 y nang cao hoi. hieu ve cam ((duc van) OR (duc va)) hanh hai ((cua te) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang cao hoi. hieu ve cam ((duc van) OR (duc va)) hanh hai ((cua te) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang cao hoi. hieu ve cam ((duc van) OR (duc va)) hanh hai ((cua te) or (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang cao hoi. hieu ve cam ((duc van) OR (duc va)) hanh hai ((cua te) or (cua tuc))*.