Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
chat tuc » chat xuc, luat tuc, chat huu
tu sach » thu sach, su sach, tu cach
hanh va » hang va, hanh vi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (te sach)) ky nang ma hoi. hieu ve chat tuc va ((hanh va) or (hanh tai)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ma hoi. hieu ve chat tuc va ((hanh va) OR (hanh tai)) va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang ma hoi. hieu ve chat tuc va ((hanh va) or (hanh tai)) va thiet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang ma hoi. hieu ve chat tuc va ((hanh va) or (hanh tai)) va thiet*.