Perhaps you should try some spelling variations:
tang mai » tang ma, tang tai, lang mai
tu sach » thu sach, su sach, te sach
va tinh » may tinh
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
cham lo » cham o, cam lo, cham soc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
y tang » ky tang, 6 tang, 7 tang

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 y tang mai hoi. hieu ve ((cham lo) or (cao ky)) va tinh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y tang mai hoi. hieu ve ((cham lo) OR (cao ky)) va tinh ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y tang mai hoi. hieu ve ((cham lo) or (cao ky)) va tinh ((vai cua) or (lai cua)) tre*.