Perhaps you should try some spelling variations:
hang dau » hang va, hang tai
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
luy tre » luyen tre
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
dau hoi » cau hoi, dai hoi, dan hoi
ky hang » ky nang, ly hang, ky dang
te sach » toc sach
ve cam » ve cham, ve cac, va cam
te sac » te cac, te san

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 hang dau hoi. hieu ve cam duc va thanh va ((luu tru) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky hang dau hoi. hieu ve cam duc va thanh va ((luu tru) OR (luy tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky hang dau hoi. hieu ve cam duc va thanh va ((luu tru) or (luy tre))".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky hang dau hoi. hieu ve cam duc va thanh va ((luu tru) or (luy tre))*.