Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
gianh lai » gian lan
va gianh » va gian, van giang, va giai
vien cac » vien bach, vien dai, vien da
sang mai » sang ma, lang mai, hoang mai
sang tai » hang tai, sang tao, tang tai
hieu va » lieu va, hieu qua
cam duc » cao duc, pham duc, nam duoc
lai cua » dai cua, hai cua, lai chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: vien cac ky ((sang mai) or (sang tai)) hoi. hieu va ((cam duc) or (cam xuc)) va gianh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vien cac ky ((sang mai) OR (sang tai)) hoi. hieu va ((cam duc) OR (cam xuc)) va gianh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: vien cac ky ((sang mai) or (sang tai)) hoi. hieu va ((cam duc) or (cam xuc)) va gianh lai cua triet*.