Perhaps you should try some spelling variations:
van tuan » van quan, van ban, anh tuan
te sach » toc sach
va pham » van pham, va phat, va phap
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ((ma hoi) or (ma hoa)). hieu va pham duc van tuan ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((ma hoi) OR (ma hoa)). hieu va pham duc van tuan ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((ma hoi) or (ma hoa)). hieu va pham duc van tuan ((vai cua) or (lai cua)) tre*.