Perhaps you should try some spelling variations:
chat thien » phat trien, cai thien, phat hien
trinh hoa » trinh do, trinh han
tinh hoa » tinh hoc, minh hoa, thanh hoa
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cao suc » cao su, cao duc
te sac » te cac, te san
suc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa
ve cao » va cao, ve bao, ve cac

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) or (te sach)) ky nang ma hoi. hieu ve cao suc va ((tinh hoa) OR (trinh hoa)) chat thien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang ma hoi. hieu ve cao suc va ((tinh hoa) OR (trinh hoa)) chat thien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ky nang ma hoi. hieu ve cao suc va ((tinh hoa) OR (trinh hoa)) chat thien".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky nang ma hoi. hieu ve cao suc va ((tinh hoa) OR (trinh hoa)) chat thien*.