Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang mai » nang ma, nang tai, lang mai
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
mai hoi » mai khoi, dai hoi, lai hoi
tu sach » thu sach, te sach, tu cach
vu nang » vuc nang, va nang, vu dang
su sach » so sach, vu sach
hieu va » hieu qua
anh ki » anh kinh, anh kiem, anh kien
ki su » ky su

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 (su sach)) vu nang mai hoi. ((hieu va) or (lieu va)) cam xuc van anh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) vu nang mai hoi. ((hieu va) OR (lieu va)) cam xuc van anh ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) vu nang mai hoi. ((hieu va) or (lieu va)) cam xuc van anh ki su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) vu nang mai hoi. ((hieu va) or (lieu va)) cam xuc van anh ki su triet*.