Perhaps you should try some spelling variations:
cuc tren » cu tren, duc tren, nuoc tren
nhan tai » hang tai, van tai, toan tai
hieu van » hieu va, thien van, lieu va
ty hang » ly hang, ty xang, thi hang
mai hoi » mai khoi, dai hoi, lai hoi
van cam » van nam, van lam, van cau
ty nang » ky nang, ty xang, ly nang
tu sach » thu sach, su sach, te sach
xac va » tac va, ac va, bac va

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 ((ty nang) or (ty hang)) mai hoi. hieu van cam ((xac va) or (duc va)) nhan tai cuc tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) mai hoi. hieu van cam ((xac va) OR (duc va)) nhan tai cuc tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty hang)) mai hoi. hieu van cam ((xac va) or (duc va)) nhan tai cuc tren*.